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2606:4700:4400::6812:2857 Public Scan

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Submitted URL:
https://blog.fennel.ai/p/real-world-recommendation-system?s=r&utm_campaign=post&%20utm_medium=web
Effective URL:
https://blog.fennel.ai/p/real-world-recommendation-system?s=r&utm_campaign=post&%20utm_medium=web
Submission: On April 22 via manual (April 22nd 2022, 7:23:40 am UTC) from ZA — Scanned from DE

Summary HTTP 23 Redirects Links 12 Behaviour Indicators

Summary

This website contacted 7 IPs in 2 countries across 5 domains to perform 23 HTTP transactions. The main IP is 2606:4700:4400::6812:2857, located in United States and belongs to CLOUDFLARENET, US. The main domain is blog.fennel.ai.
TLS certificate: Issued by Cloudflare Inc ECC CA-3 on April 11th 2022. Valid for: a year.

This is the only time blog.fennel.ai was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

	IP Address	AS Autonomous System
6	2606:4700:440... 2606:4700:4400::6812:2857	13335 (CLOUDFLAR...) (CLOUDFLARENET)
9	2600:9000:223... 2600:9000:223d:ca00:3:e0f8:540:93a1	16509 (AMAZON-02) (AMAZON-02)
1	2a00:1450:400... 2a00:1450:4001:808::2003	15169 (GOOGLE) (GOOGLE)
2	2a04:4e42:400... 2a04:4e42:400::729	54113 (FASTLY) (FASTLY)
3	2606:4700:440... 2606:4700:4400::ac40:9a0b	13335 (CLOUDFLAR...) (CLOUDFLARENET)
1	2a00:1450:400... 2a00:1450:4001:829::2008	15169 (GOOGLE) (GOOGLE)
23	7

6 2606:4700:4400::6812:2857 (United States)

ASN13335 (CLOUDFLARENET, US)

blog.fennel.ai	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

9 2600:9000:223d:ca00:3:e0f8:540:93a1 (United States)

ASN16509 (AMAZON-02, US)

cdn.substack.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 2a00:1450:4001:808::2003 (Frankfurt am Main, Germany)

ASN15169 (GOOGLE, US)

fonts.gstatic.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

2 2a04:4e42:400::729 (United States)

ASN54113 (FASTLY, US)

js.sentry-cdn.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

3 2606:4700:4400::ac40:9a0b (United States)

ASN13335 (CLOUDFLARENET, US)

substack.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 2a00:1450:4001:829::2008 (Frankfurt am Main, Germany)

ASN15169 (GOOGLE, US)

www.googletagmanager.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

	Apex Domain Subdomains	Transfer
12	substack.com cdn.substack.com — Cisco Umbrella Rank: 26671 substack.com — Cisco Umbrella Rank: 18840 Failed	1 MB
6	fennel.ai blog.fennel.ai	32 KB
2	sentry-cdn.com js.sentry-cdn.com — Cisco Umbrella Rank: 5009	2 KB
1	googletagmanager.com www.googletagmanager.com — Cisco Umbrella Rank: 71	67 KB
1	gstatic.com fonts.gstatic.com	13 KB
23	5

	Domain	Requested by
9	cdn.substack.com	blog.fennel.ai substack.com
6	blog.fennel.ai	blog.fennel.ai cdn.substack.com
3	substack.com	cdn.substack.com substack.com
2	js.sentry-cdn.com	blog.fennel.ai substack.com
1	www.googletagmanager.com	cdn.substack.com
1	fonts.gstatic.com	blog.fennel.ai
23	6

This site contains links to these domains. Also see Links.

Domain
substack.com
cdn.substack.com
podmix.substack.com
murmel.social

Subject Issuer	Validity	Valid
blog.fennel.ai Cloudflare Inc ECC CA-3	`2022-04-11` - `2023-04-11`	a year	crt.sh
substack.com Amazon	`2021-12-07` - `2023-01-04`	a year	crt.sh
*.gstatic.com GTS CA 1C3	`2022-03-28` - `2022-06-20`	3 months	crt.sh
*.sentry-cdn.com GlobalSign Atlas R3 DV TLS CA H2 2021	`2021-11-26` - `2022-12-28`	a year	crt.sh
sni.cloudflaressl.com Cloudflare Inc ECC CA-3	`2021-11-13` - `2022-11-12`	a year	crt.sh
*.google-analytics.com GTS CA 1C3	`2022-04-11` - `2022-07-04`	3 months	crt.sh

This page contains 3 frames:

Primary Page: https://blog.fennel.ai/p/real-world-recommendation-system?s=r&utm_campaign=post&%20utm_medium=web
Frame ID: 7F9EE5B2802B4E5534DAB769A08BE7FF
Requests: 15 HTTP requests in this frame

Frame: https://substack.com/channel-frame
Frame ID: 60F29EEFC45D0C94E1E39F38E3B0ADE5
Requests: 1 HTTP requests in this frame

Frame: https://substack.com/channel-frame
Frame ID: 58E4DDE1CA2676F37E7C41B15331A0BF
Requests: 7 HTTP requests in this frame

Screenshot
Live screenshot

Full Image

Page Title

Real World Recommendation System - Part 1 - by Nikhil GargCommentShareCommentShare

Detected technologies

Google Tag Manager (Tag Managers) Expand

Overall confidence: 100%
Detected patterns

googletagmanager\.com/gtag/js

Page Statistics

23
Requests

96 %
HTTPS

100 %
IPv6

5
Domains

6
Subdomains

7
IPs

2
Countries

1216 kB
Transfer

4662 kB
Size

5
Cookies

12 Outgoing links

These are links going to different origins than the main page.

URL: https://substack.com/profile/81711320-nikhil-garg

Search URL Search Domain Scan URL

URL: https://cdn.substack.com/image/fetch/f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2F1cacae00-cc59-46b1-bac2-71eeb72828ac_960x720.jpeg

Search URL Search Domain Scan URL

URL: https://substack.com/sign-in?redirect=%2Fp%2Freal-world-recommendation-system%3Fs%3Dr%26utm_campaign%3Dpost%26%2520utm_medium%3Dweb&for_pub=fennel&change_user=false
Title: Already a paid subscriber? Sign in

Search URL Search Domain Scan URL

URL: https://substack.com/sign-in?redirect=%2Fp%2Freal-world-recommendation-system%3Fs%3Dr%26utm_campaign%3Dpost%26%2520utm_medium%3Dweb&for_pub=fennel&with_password=true
Title: click here to sign in

Search URL Search Domain Scan URL

URL: https://substack.com/profile/14105748-steven-eckhoff

Search URL Search Domain Scan URL

URL: https://substack.com/profile/9006862-preslav-rachev

Search URL Search Domain Scan URL

URL: https://podmix.substack.com/?utm_source=substack&utm_medium=web&utm_content=comment_metadata
Title: Writes The Mixtape

Search URL Search Domain Scan URL

URL: https://murmel.social/
Title: https://murmel.social

Search URL Search Domain Scan URL

URL: https://substack.com/ccpa#personal-data-collected
Title: Collection notice

Search URL Search Domain Scan URL

URL: https://substack.com/signup?utm_source=substack&utm_medium=web&utm_content=footer
Title: Publish on Substack

Search URL Search Domain Scan URL

URL: https://substack.com/app/app-store-redirect?utm_campaign=app-marketing&utm_content=web-footer-button
Title: Get the app

Search URL Search Domain Scan URL

URL: https://substack.com/
Title: Substack

Search URL Search Domain Scan URL

Redirected requests

There were HTTP redirect chains for the following requests:

23 HTTP transactions
0 data transactions

Method
Protocol Status Resource
Path Size
x-fer Time
Latency Type
MIME-Type IP
Location

GET
H2 200 Primary Request real-world-recommendation-system Show response
blog.fennel.ai/p/ 100 KB
28 KB 919ms
661ms Document
text/html 2606:4700:4400::6812:2857
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL

https://blog.fennel.ai/p/real-world-recommendation-system?s=r&utm_campaign=post&%20utm_medium=web

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2606:4700:4400::6812:2857 , United States, ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare / Express

Resource Hash

264f4bbf7286ccf715a15e247c782ca6bad8459ff0831cdf14c991cbb256d14f

Security Headers

Name	Value
Strict-Transport-Security	max-age=31536000
X-Frame-Options	sameorigin

Request headers

Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36
accept-language: de-DE,de;q=0.9

Response headers

cache-control: no-cache
cf-cache-status: MISS
cf-ray: 6ffc9d64db479a41-FRA
content-encoding: gzip
content-type: text/html; charset=utf-8
date: Fri, 22 Apr 2022 07:23:35 GMT
etag: W/"190b1-TF9uylK6BJks91NgVvIgJQhl9UI"
expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
server: cloudflare
strict-transport-security: max-age=31536000
vary: Accept-Encoding
via: 1.1 vegur
x-cluster: substack
x-frame-options: sameorigin
x-powered-by: Express
x-served-by: Substack

GET
H2 200 main.css
cdn.substack.com/theme/ 539 KB
71 KB 43ms
8ms Stylesheet
text/css 2600:9000:223d:ca00:3:e0f8:540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to

Full URL

https://cdn.substack.com/theme/main.css?v=511c5665b7325f68b4392c2d335c3510

Requested by

Host: blog.fennel.ai
URL: https://blog.fennel.ai/p/real-world-recommendation-system?s=r&utm_campaign=post&%20utm_medium=web

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2600:9000:223d:ca00:3:e0f8:540:93a1 , United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Cowboy / Express

Resource Hash

e400c9422bb105abf7b5a029fca6c2bcf6455c4035a6982a8c0ee5881dee6725

Security Headers

Name	Value
Strict-Transport-Security	max-age=31536000

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://blog.fennel.ai/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Response headers

strict-transport-security: max-age=31536000
x-cluster: substack
etag: W/"86b28-sZBPPjCRTP+Hxxk/LgKhLEn+04I"
age: 27348
x-powered-by: Express
x-cache: Hit from cloudfront
content-encoding: gzip
x-served-by: Substack
server: Cowboy
date: Thu, 21 Apr 2022 23:47:47 GMT
vary: Accept-Encoding
content-type: text/css; charset=utf-8
via: 1.1 vegur, 1.1 8af5231b014ab5e8c35000dd4cf4b68c.cloudfront.net (CloudFront)
cache-control: public, max-age=31557600
x-amz-cf-pop: FRA56-P3
x-amz-cf-id: 9B3pq7aM_2vDAI6Tiwo11MAi-rD6DgpymsEiUjqlg08ii7tcQ4xXUQ==

GET
H2 200 https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2Fdef183c5-b31b-4e80-81bc-0510edcd102e_144x144.png
cdn.substack.com/image/fetch/w_90,h_90,c_fill,f_auto,q_auto:good,fl_progressive:steep/ 6 KB
6 KB 53ms
18ms Image
image/png 2600:9000:223d:ca00:3:e0f8:540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to Show image

Full URL

https://cdn.substack.com/image/fetch/w_90,h_90,c_fill,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2Fdef183c5-b31b-4e80-81bc-0510edcd102e_144x144.png

Requested by

Host: blog.fennel.ai
URL: https://blog.fennel.ai/p/real-world-recommendation-system?s=r&utm_campaign=post&%20utm_medium=web

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2600:9000:223d:ca00:3:e0f8:540:93a1 , United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

imgix /

Resource Hash

18ce2aca0273bda0ec42f9c26911adba036baba56c6c6deed7af3926f56812dc

Security Headers

Name	Value
X-Content-Type-Options	nosniff

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://blog.fennel.ai/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Response headers

date: Mon, 11 Apr 2022 16:45:54 GMT
via: 1.1 8af5231b014ab5e8c35000dd4cf4b68c.cloudfront.net (CloudFront)
x-content-type-options: nosniff
age: 980649
x-cache: Hit from cloudfront
x-imgix-id: bda72a812c5ee9bb5175a053b018492acd3d8029
content-length: 5869
x-served-by: cache-sjc10020-SJC, cache-fra19139-FRA
last-modified: Sun, 10 Apr 2022 22:59:26 GMT
server: imgix
content-type: image/png
access-control-allow-origin: *
cache-control: public, max-age=31536000
x-amz-cf-pop: FRA56-P3
accept-ranges: bytes
x-amz-cf-id: VC35LQYnVt8ELEn7U_9_4DGxHclGhBNsmDsqIAQWMpYLbtDZQVHTVg==
cross-origin-resource-policy: cross-origin

GET
H2 200 rnCr-xNNww_2s0amA9M5knjsS_ul.woff2
fonts.gstatic.com/s/spectral/v5/ 13 KB
13 KB 48ms
14ms Font
font/woff2 2a00:1450:4001:808::2003
GOOGLE

General

Check archive.org

Show headers Download Go to

Full URL

https://fonts.gstatic.com/s/spectral/v5/rnCr-xNNww_2s0amA9M5knjsS_ul.woff2

Requested by

Host: blog.fennel.ai
URL: https://blog.fennel.ai/p/real-world-recommendation-system?s=r&utm_campaign=post&%20utm_medium=web

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2a00:1450:4001:808::2003 Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),

Reverse DNS

Software

sffe /

Resource Hash

39bd592e2aef8e954c384d26b446860540424cc3413a21f0491b8669d38473d7

Security Headers

Name	Value
X-Content-Type-Options	nosniff
X-Xss-Protection	0

Request headers

Referer: https://blog.fennel.ai/
Origin: https://blog.fennel.ai
accept-language: de-DE,de;q=0.9
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Response headers

date: Mon, 18 Apr 2022 21:20:34 GMT
x-content-type-options: nosniff
age: 295381
content-security-policy-report-only: require-trusted-types-for 'script'; report-uri https://csp.withgoogle.com/csp/apps-themes
cross-origin-resource-policy: cross-origin
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000,h3-Q050=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"
content-length: 12924
x-xss-protection: 0
last-modified: Wed, 09 Jan 2019 19:23:08 GMT
server: sffe
report-to: {"group":"apps-themes","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/apps-themes"}]}
content-type: font/woff2
access-control-allow-origin: *
cache-control: public, max-age=31536000
accept-ranges: bytes
timing-allow-origin: *
cross-origin-opener-policy-report-only: same-origin; report-to="apps-themes"
expires: Tue, 18 Apr 2023 21:20:34 GMT

GET
H2 200 https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2F1cacae00-cc59-46b1-bac2-71eeb72828ac_960x720.jpeg
cdn.substack.com/image/fetch/w_1456,c_limit,f_webp,q_auto:good,fl_progressive:steep/ 14 KB
14 KB 9ms
8ms Image
image/webp 2600:9000:223d:ca00:3:e0f8:540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to Show image

Full URL

https://cdn.substack.com/image/fetch/w_1456,c_limit,f_webp,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2F1cacae00-cc59-46b1-bac2-71eeb72828ac_960x720.jpeg

Requested by

Host: blog.fennel.ai
URL: https://blog.fennel.ai/p/real-world-recommendation-system?s=r&utm_campaign=post&%20utm_medium=web

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2600:9000:223d:ca00:3:e0f8:540:93a1 , United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

imgix /

Resource Hash

0a31dcd0a9bcede6108fd38eee61751c2605dd1bf3f4c5cbf7c6a34115dc5422

Security Headers

Name	Value
X-Content-Type-Options	nosniff

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://blog.fennel.ai/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Response headers

date: Mon, 11 Apr 2022 16:48:28 GMT
via: 1.1 8af5231b014ab5e8c35000dd4cf4b68c.cloudfront.net (CloudFront)
x-content-type-options: nosniff
fastly-original-body-size: 13940
age: 988528
x-cache: Hit from cloudfront
x-imgix-id: d5e6517ebd057fe13eb8e22aa74eb2d57557ab0a
content-length: 13940
x-served-by: cache-sjc10074-SJC, cache-hhn4065-HHN
last-modified: Sun, 10 Apr 2022 20:48:06 GMT
server: imgix
content-type: image/webp
access-control-allow-origin: *
cache-control: public, max-age=31536000
x-amz-cf-pop: FRA56-P3
accept-ranges: bytes
x-amz-cf-id: APPHlzv_XJWVEiwJB7ifOb484p2BSwkmxXdRR0FvaS-PxGK1yLyL3Q==
cross-origin-resource-policy: cross-origin

GET
H2 200 https%3A%2F%2Fsubstack.com%2Fimg%2Favatars%2Flogged-out.png
cdn.substack.com/image/fetch/w_66,h_66,c_fill,f_auto,q_auto:good,fl_progressive:steep/ 684 B
1 KB 8ms
8ms Image
image/png 2600:9000:223d:ca00:3:e0f8:540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to Show image

Full URL

https://cdn.substack.com/image/fetch/w_66,h_66,c_fill,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack.com%2Fimg%2Favatars%2Flogged-out.png

Requested by

Host: blog.fennel.ai
URL: https://blog.fennel.ai/p/real-world-recommendation-system?s=r&utm_campaign=post&%20utm_medium=web

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2600:9000:223d:ca00:3:e0f8:540:93a1 , United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Cloudinary /

Resource Hash

2d61245fa18c97209ecbbe51e3d5f1d4b0c6fbf91c7d220d66a2888b8004136d

Security Headers

Name	Value
X-Content-Type-Options	nosniff

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://blog.fennel.ai/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Response headers

date: Thu, 21 Oct 2021 19:39:01 GMT
via: 1.1 8af5231b014ab5e8c35000dd4cf4b68c.cloudfront.net (CloudFront)
x-content-type-options: nosniff
age: 15767074
x-cache: Hit from cloudfront
server-timing: fastly;dur=118;cpu=1;start=2021-10-21T19:39:01.252Z;desc=miss,rtt;dur=0,cloudinary;dur=24;start=2021-10-21T19:39:01.299Z
content-length: 684
last-modified: Thu, 21 Oct 2021 19:39:01 GMT
server: Cloudinary
etag: "bb1c391c1d2a435bc3d6d2adce00fc13"
content-type: image/png
access-control-allow-origin: *
access-control-expose-headers: Content-Length,ETag,Server-Timing,Vary,X-Content-Type-Options
cache-control: private, no-transform, immutable, max-age=31557600
x-amz-cf-pop: FRA56-P3
accept-ranges: bytes
timing-allow-origin: *
x-amz-cf-id: RkpyiXklykEsIYt87VVdv5wQf5ji4eLtPFPxuYpKYxCoywHu9K_bEg==

GET
H2 200 https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2F894edfc2-5280-4900-b07e-c9f56f64b39e_144x144.png
cdn.substack.com/image/fetch/w_66,h_66,c_fill,f_auto,q_auto:good,fl_progressive:steep/ 4 KB
5 KB 8ms
8ms Image
image/png 2600:9000:223d:ca00:3:e0f8:540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to Show image

Full URL

https://cdn.substack.com/image/fetch/w_66,h_66,c_fill,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2F894edfc2-5280-4900-b07e-c9f56f64b39e_144x144.png

Requested by

Host: blog.fennel.ai
URL: https://blog.fennel.ai/p/real-world-recommendation-system?s=r&utm_campaign=post&%20utm_medium=web

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2600:9000:223d:ca00:3:e0f8:540:93a1 , United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

imgix /

Resource Hash

c75d934fc320a9840491188ff1d69cc4bb1b9481055b6f97d03e98b1ac5c02bf

Security Headers

Name	Value
X-Content-Type-Options	nosniff

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://blog.fennel.ai/
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Response headers

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x-served-by: getsentry-web-default-production-67b5c45d5-mr6dx, cache-ord1725-ORD, cache-fra19152-FRA
x-frame-options: deny
strict-transport-security: max-age=31536000; includeSubDomains
content-type: text/javascript
access-control-allow-origin: *
cache-control: public, max-age=3600, s-maxage=60, stale-while-revalidate=315360000, stale-if-error=315360000
x-envoy-attempt-count: 1
accept-ranges: bytes

GET
H2 200 substack.bundle.js Show response
cdn.substack.com/min/ Frame 58E4 2 MB
477 KB 8ms
8ms Script
application/javascript 2600:9000:223d:ca00:3:e0f8:540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to

Full URL

https://cdn.substack.com/min/substack.bundle.js?v=195680-1804e601b78

Requested by

Host: substack.com
URL: https://substack.com/channel-frame

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2600:9000:223d:ca00:3:e0f8:540:93a1 , United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Cowboy / Express

Resource Hash

e867f4776c41aea8ccab702a46aea0736e84e72b56d4fef2c3bce63074082860

Security Headers

Name	Value
Strict-Transport-Security	max-age=31536000

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://substack.com/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Response headers

strict-transport-security: max-age=31536000
x-cluster: substack
etag: W/"195680-1804e601b78"
age: 27348
x-powered-by: Express
x-cache: Hit from cloudfront
content-encoding: gzip
x-served-by: Substack
last-modified: Thu, 21 Apr 2022 23:06:03 GMT
server: Cowboy
date: Thu, 21 Apr 2022 23:47:47 GMT
vary: Accept-Encoding
content-type: application/javascript; charset=UTF-8
via: 1.1 vegur, 1.1 8af5231b014ab5e8c35000dd4cf4b68c.cloudfront.net (CloudFront)
cache-control: public, max-age=31536000000
x-amz-cf-pop: FRA56-P3
x-amz-cf-id: 5jcZOhhZDiWNlu95c1tmUi1AhFOoGY6VlUCGdCoirMSYTRoHYgM6lg==

GET
H2 200 firehose
substack.com/api/v1/ Frame 58E4 35 B
519 B 3847ms
3846ms Image
image/gif 2606:4700:4400::ac40:9a0b
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL

https://substack.com/api/v1/firehose?_=1650612216018&d=eyJldmVudCI6IlBhZ2VzIiwicHJvcGVydGllcyI6eyJicm93c2VyU2Vzc2lvbklkIjoib3FtdG9lNmt6NXAiLCJpZnJhbWVWaXNpdElkIjp7ImlkIjoiMWJkOWEzMjYtOTEzNi00YmY5LWE1NzItYWY1YzkzMzFiYTRkIiwidGltZXN0YW1wIjoiMjAyMi0wNC0yMlQwNzoyMzozNi4wMTdaIn19LCJjb250ZXh0Ijp7ImNsaWVudF90eXBlIjoid2ViIiwicGFnZSI6eyJyZWZlcnJlciI6Imh0dHBzOi8vYmxvZy5mZW5uZWwuYWkvIiwidGl0bGUiOiJTdWJzdGFjayAtIFN0YXJ0IGEgcGFpZCBuZXdzbGV0dGVyIiwidXJsIjoiaHR0cHM6Ly9zdWJzdGFjay5jb20vY2hhbm5lbC1mcmFtZSJ9fX0%3D

Requested by

Host: substack.com
URL: https://substack.com/channel-frame

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2606:4700:4400::ac40:9a0b , United States, ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare / Express

Resource Hash

6adc3d4c1056996e4e8b765a62604c78b1f867cceb3b15d0b9bedb7c4857f992

Security Headers

Name	Value
Strict-Transport-Security	max-age=31536000

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://substack.com/channel-frame
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Response headers

date: Fri, 22 Apr 2022 07:23:36 GMT
via: 1.1 vegur
cf-cache-status: DYNAMIC
x-cluster: substack
server: cloudflare
x-powered-by: Express
expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
vary: Accept-Encoding
content-type: image/gif
cache-control: no-cache
strict-transport-security: max-age=31536000
cf-ray: 6ffc9d6e8cdb9bc5-FRA
alt-svc: h3=":443"; ma=86400, h3-29=":443"; ma=86400
content-length: 35
x-served-by: Substack

GET
H2 200 firehose
substack.com/api/v1/ Frame 58E4 35 B
553 B 3681ms
3680ms Image
image/gif 2606:4700:4400::ac40:9a0b
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL

https://substack.com/api/v1/firehose?_=1650612216081&d=eyJldmVudCI6IkZyYW1lIE1lc3NhZ2UgU2VudCIsInByb3BlcnRpZXMiOnsiYnJvd3NlclNlc3Npb25JZCI6Im9xbXRvZTZrejVwIiwiaWZyYW1lVmlzaXRJZCI6eyJpZCI6IjFiZDlhMzI2LTkxMzYtNGJmOS1hNTcyLWFmNWM5MzMxYmE0ZCIsInRpbWVzdGFtcCI6IjIwMjItMDQtMjJUMDc6MjM6MzYuMDE3WiJ9LCJoYXNVc2VyU3RhdGUiOmZhbHNlfSwiY29udGV4dCI6eyJjbGllbnRfdHlwZSI6IndlYiIsInBhZ2UiOnsicmVmZXJyZXIiOiJodHRwczovL2Jsb2cuZmVubmVsLmFpLyIsInRpdGxlIjoiU3Vic3RhY2sgLSBTdGFydCBhIHBhaWQgbmV3c2xldHRlciIsInVybCI6Imh0dHBzOi8vc3Vic3RhY2suY29tL2NoYW5uZWwtZnJhbWUifX19

Requested by

Host: substack.com
URL: https://substack.com/channel-frame

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2606:4700:4400::ac40:9a0b , United States, ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare / Express

Resource Hash

6adc3d4c1056996e4e8b765a62604c78b1f867cceb3b15d0b9bedb7c4857f992

Security Headers

Name	Value
Strict-Transport-Security	max-age=31536000

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://substack.com/channel-frame
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Response headers

date: Fri, 22 Apr 2022 07:23:36 GMT
via: 1.1 vegur
cf-cache-status: DYNAMIC
x-cluster: substack
server: cloudflare
x-powered-by: Express
expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
vary: Accept-Encoding
content-type: image/gif
cache-control: no-cache
strict-transport-security: max-age=31536000
cf-ray: 6ffc9d6e8cde9bc5-FRA
alt-svc: h3=":443"; ma=86400, h3-29=":443"; ma=86400
content-length: 35
x-served-by: Substack

GET
H2 200 firehose
blog.fennel.ai/api/v1/ 35 B
545 B 3809ms
3808ms Image
image/gif 2606:4700:4400::6812:2857
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL

https://blog.fennel.ai/api/v1/firehose?_=1650612216119&d=eyJldmVudCI6IkZyYW1lIE1lc3NhZ2UgSGFuZGxlZCIsInByb3BlcnRpZXMiOnsiYnJvd3NlclNlc3Npb25JZCI6ImdkcWEyYXNjNzBuIiwiaWZyYW1lVmlzaXRJZCI6ZmFsc2UsImxvZ2dlZEluQXRTdWJzdGFjayI6ZmFsc2UsImxvZ2dlZEluQXRDdXN0b21Eb21haW4iOmZhbHNlLCJhdHRlbXB0UmVkaXJlY3QiOmZhbHNlfSwiY29udGV4dCI6eyJjbGllbnRfdHlwZSI6IndlYiIsInBhZ2UiOnsicmVmZXJyZXIiOiIiLCJ0aXRsZSI6IlJlYWwgV29ybGQgUmVjb21tZW5kYXRpb24gU3lzdGVtIC0gUGFydCAxIC0gYnkgTmlraGlsIEdhcmciLCJ1cmwiOiJodHRwczovL2Jsb2cuZmVubmVsLmFpL3AvcmVhbC13b3JsZC1yZWNvbW1lbmRhdGlvbi1zeXN0ZW0_cz1yJnV0bV9jYW1wYWlnbj1wb3N0JiUyMHV0bV9tZWRpdW09d2ViIn19fQ%3D%3D

Requested by

Host: blog.fennel.ai
URL: https://blog.fennel.ai/p/real-world-recommendation-system?s=r&utm_campaign=post&%20utm_medium=web

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2606:4700:4400::6812:2857 , United States, ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare / Express

Resource Hash

6adc3d4c1056996e4e8b765a62604c78b1f867cceb3b15d0b9bedb7c4857f992

Security Headers

Name	Value
Strict-Transport-Security	max-age=31536000

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://blog.fennel.ai/p/real-world-recommendation-system?s=r&utm_campaign=post&%20utm_medium=web
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Response headers

date: Fri, 22 Apr 2022 07:23:39 GMT
via: 1.1 vegur
cf-cache-status: DYNAMIC
x-cluster: substack
server: cloudflare
x-powered-by: Express
expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
vary: Accept-Encoding
content-type: image/gif
cache-control: no-cache
strict-transport-security: max-age=31536000
cf-ray: 6ffc9d857cb09a41-FRA
content-length: 35
x-served-by: Substack

GET
H2 200 js Show response
www.googletagmanager.com/gtag/ Frame 58E4 180 KB
67 KB 56ms
21ms Script
application/javascript 2a00:1450:4001:829::2008
GOOGLE

General

Check archive.org

Show headers Download Go to

Full URL

https://www.googletagmanager.com/gtag/js?id=G-TLW0DF6G5V&l=localGaDataLayer

Requested by

Host: cdn.substack.com
URL: https://cdn.substack.com/min/substack.bundle.js?v=195680-1804e601b78

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2a00:1450:4001:829::2008 Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),

Reverse DNS

Software

Google Tag Manager /

Resource Hash

a6bf80d6681c6050a3af66b13a996dfcff296144e181606e3b3921204ad2e809

Security Headers

Name	Value
Strict-Transport-Security	max-age=31536000; includeSubDomains
X-Xss-Protection	0

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://substack.com/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Response headers

date: Fri, 22 Apr 2022 07:23:39 GMT
content-encoding: br
server: Google Tag Manager
access-control-allow-headers: Cache-Control
vary: Accept-Encoding
content-type: application/javascript; charset=UTF-8
access-control-allow-origin: *
cache-control: private, max-age=900
access-control-allow-credentials: true
cross-origin-resource-policy: cross-origin
strict-transport-security: max-age=31536000; includeSubDomains
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000,h3-Q050=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"
content-length: 67792
x-xss-protection: 0
expires: Fri, 22 Apr 2022 07:23:39 GMT

Failed requests

These URLs were requested, but there was no response received. You will also see them in the list above.

Domain: substack.com
URL: https://substack.com/channel-frame

Verdicts & Comments Add Verdict or Comment

26 JavaScript Global Variables

These are the non-standard "global" variables defined on the window object. These can be helpful in identifying possible client-side frameworks and code.

5 Cookies

Cookies are little pieces of information stored in the browser of a user. Whenever a user visits the site again, he will also send his cookie values, thus allowing the website to re-identify him even if he changed locations. This is how permanent logins work.

Domain/Path	Expires	Name / Value
blog.fennel.ai/	1970-01-20 11:15:48	Name: ajs_anonymous_id Value: %2201d8f2c0-9dc0-43c6-9a3b-ec1c1802a8da%22
.substack.com/	1970-01-20 02:30:14	Name: __cf_bm Value: twxaq_sQNCBBEufxvfDMkC.1BXw8Tlq6sHRvBfXzaps-1650612215-0-ARSCrkb8CK9OMetcyFRDbvNHQMRz0tWoHjePfsoD3RVo0bhi2oREpW2IH3n2+07iHcIZVTDe+g42IU/O54sb2vU=
.blog.fennel.ai/	1970-01-20 11:15:48	Name: ajs_anonymous_id Value: %2201d8f2c0-9dc0-43c6-9a3b-ec1c1802a8da%22
.blog.fennel.ai/	1970-01-20 02:30:14	Name: visit_id Value: %7B%22id%22%3A%22c566936e-59b7-4a94-8214-50c65e9fc4ea%22%2C%22timestamp%22%3A%222022-04-22T07%3A23%3A36.047Z%22%7D
.blog.fennel.ai/	1970-01-20 11:15:48	Name: ab_testing_id Value: %22d8a3943c-c6d9-43f2-bdd8-63ed9a62c139%22

Security Headers

This page lists any security headers set by the main page. If you want to understand what these mean and how to use them, head on over to this page

Header	Value
Strict-Transport-Security	max-age=31536000
X-Frame-Options	sameorigin

Indicators

This is a term in the security industry to describe indicators such as IPs, Domains, Hashes, etc. This does not imply that any of these indicate malicious activity.

blog.fennel.ai
cdn.substack.com
fonts.gstatic.com
js.sentry-cdn.com
substack.com
www.googletagmanager.com
substack.com
2600:9000:223d:ca00:3:e0f8:540:93a1
2606:4700:4400::6812:2857
2606:4700:4400::ac40:9a0b
2a00:1450:4001:808::2003
2a00:1450:4001:829::2008
2a04:4e42:400::729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blog.fennel.ai Open in urlscan Pro 2606:4700:4400::6812:2857 Public Scan

Summary

urlscan.io Verdict: No classification

Domain & IP information

Screenshot Live screenshot Full Image

Page Title

Detected technologies

Page Statistics

23 Requests

96 %HTTPS

100 %IPv6

5 Domains

6 Subdomains

7 IPs

2 Countries

1216 kBTransfer

4662 kBSize

5 Cookies

12 Outgoing links

Redirected requests

23 HTTP transactions Everything HTML Script AJAX CSS Image Expand all 0 data transactions

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

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Response headers

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Response headers

Request headers

Response headers

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Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

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Response headers

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Response headers

Request headers

Response headers

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Response headers

Request headers

Response headers

Failed requests

Verdicts & Comments Add Verdict or Comment

26 JavaScript Global Variables

5 Cookies

Security Headers

Indicators

blog.fennel.ai Open in urlscan Pro
2606:4700:4400::6812:2857 Public Scan

Screenshot
Live screenshot

Full Image

23
Requests

96 %
HTTPS

100 %
IPv6

5
Domains

6
Subdomains

7
IPs

2
Countries

1216 kB
Transfer

4662 kB
Size

5
Cookies

23 HTTP transactions
0 data transactions