URL: https://thesideletter.co/
Submission: On July 19 via api from US — Scanned from DE

Summary

This website contacted 8 IPs in 2 countries across 6 domains to perform 33 HTTP transactions. The main IP is 76.76.21.21, located in Walnut, United States and belongs to AMAZON-02, US. The main domain is thesideletter.co.
TLS certificate: Issued by R3 on May 29th 2024. Valid for: 3 months.
This is the only time thesideletter.co was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

Apex Domain
Subdomains
Transfer
22 thesideletter.co
thesideletter.co
269 KB
6 super.so
assets-v2.super.so — Cisco Umbrella Rank: 457743
sites.super.so
assets.super.so — Cisco Umbrella Rank: 671586
426 KB
2 substackapi.com
substackapi.com — Cisco Umbrella Rank: 310146
50 KB
1 google-analytics.com
region1.google-analytics.com — Cisco Umbrella Rank: 3123
1 github.io
joshmillgate.github.io
4 KB
1 googletagmanager.com
www.googletagmanager.com — Cisco Umbrella Rank: 112
102 KB
33 6
Domain Requested by
22 thesideletter.co thesideletter.co
4 assets-v2.super.so thesideletter.co
2 substackapi.com thesideletter.co
1 assets.super.so
1 region1.google-analytics.com www.googletagmanager.com
1 sites.super.so thesideletter.co
1 joshmillgate.github.io thesideletter.co
1 www.googletagmanager.com thesideletter.co
33 8

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

Domain
buy.stripe.com
calendly.com
www.linkedin.com
Subject Issuer Validity Valid
thesideletter.co
R3
2024-05-29 -
2024-08-27
3 months crt.sh
*.google-analytics.com
WR2
2024-06-24 -
2024-09-16
3 months crt.sh
*.super.so
Amazon RSA 2048 M02
2023-11-10 -
2024-12-08
a year crt.sh
*.github.io
DigiCert Global G2 TLS RSA SHA256 2020 CA1
2024-03-15 -
2025-03-14
a year crt.sh
sites.super.so
R11
2024-06-29 -
2024-09-27
3 months crt.sh
substackapi.com
WE1
2024-06-27 -
2024-09-25
3 months crt.sh

This page contains 1 frames:

Primary Page: https://thesideletter.co/
Frame ID: 41ACDFDF9BAA05B91EC2834D3E0ACD22
Requests: 33 HTTP requests in this frame

Screenshot

Page Title

The Side Letter

Detected technologies

Overall confidence: 100%
Detected patterns

Overall confidence: 100%
Detected patterns
  • googletagmanager\.com/gtag/js

Page Statistics

33
Requests

100 %
HTTPS

75 %
IPv6

6
Domains

8
Subdomains

8
IPs

2
Countries

850 kB
Transfer

2037 kB
Size

2
Cookies

Redirected requests

There were HTTP redirect chains for the following requests:

33 HTTP transactions

Resource
Path
Size
x-fer
Type
MIME-Type
Primary Request /
thesideletter.co/
184 KB
25 KB
Document
General
Full URL
https://thesideletter.co/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
6c68a717accacacf628832bb2426e8f320f09485cd9c487e6b7c8acad8f5a09d
Security Headers
Name Value
Strict-Transport-Security max-age=63072000

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Response headers

age
45384
cache-control
public, max-age=0, must-revalidate
content-encoding
br
content-type
text/html; charset=utf-8
date
Fri, 19 Jul 2024 01:43:59 GMT
etag
W/"un7er6ltos414p"
server
Vercel
strict-transport-security
max-age=63072000
vary
RSC, Next-Router-State-Tree, Next-Router-Prefetch
x-matched-path
/main/[site]/[[...page]]
x-vercel-cache
STALE
x-vercel-id
fra1::iad1::ztjtz-1721398824774-4679e08c6997
x-vercel-ip-as-number
28753
x-vercel-ip-city
Breitenbrunn
x-vercel-ip-continent
EU
x-vercel-ip-country
DE
x-vercel-ip-country-region
SN
x-vercel-ip-latitude
50.4687
x-vercel-ip-longitude
12.7663
x-vercel-ip-timezone
Europe/Berlin
image
thesideletter.co/_next/
6 KB
6 KB
Image
General
Full URL
https://thesideletter.co/_next/image?url=https%3A%2F%2Fassets.super.so%2F3d8c4dfb-6907-4505-b461-c91231ccaaf9%2Fuploads%2Flogo%2F8b91e79f-9bdc-473f-9ac2-d1913bbb96bd.png&w=256&q=90
Requested by
Host: thesideletter.co
URL: https://thesideletter.co/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
c9dedad7d681c701d17b520574f205911c05bba60bf66c69867e112e5ac59e67
Security Headers
Name Value
Content-Security-Policy default-src 'self'; script-src 'none'; sandbox;
Strict-Transport-Security max-age=63072000

Request headers

Referer
https://thesideletter.co/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Response headers

content-security-policy
default-src 'self'; script-src 'none'; sandbox;
date
Fri, 19 Jul 2024 14:20:25 GMT
x-vercel-ip-latitude
50.4687
strict-transport-security
max-age=63072000
age
0
x-vercel-imgsrc
2440b10b788dc0339fbeb02604622fd3
x-vercel-ip-country
DE
x-vercel-ip-longitude
12.7663
x-vercel-ip-timezone
Europe/Berlin
cross-origin-resource-policy
cross-origin
content-disposition
attachment; filename="8b91e79f-9bdc-473f-9ac2-d1913bbb96bd.avif"
x-vercel-ip-city
Breitenbrunn
x-vercel-ip-continent
EU
content-length
5723
last-modified
Fri, 19 Jul 2024 14:20:25 GMT
server
Vercel
x-vercel-id
fra1::lw7qb-1721398825033-f56f1f19952c
x-vercel-ip-as-number
28753
x-vercel-cache
MISS
vary
Accept
content-type
image/avif
access-control-allow-origin
*
cache-control
public, max-age=1800, must-revalidate
accept-ranges
bytes
timing-allow-origin
*
x-vercel-ip-country-region
SN
3af1a6f33e4c4d3b.css
thesideletter.co/_next/static/css/
79 KB
15 KB
Stylesheet
General
Full URL
https://thesideletter.co/_next/static/css/3af1a6f33e4c4d3b.css
Requested by
Host: thesideletter.co
URL: https://thesideletter.co/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
df38205bab7b063dec11ba479f9518cbd20f41bd9334bdc9ac9acccbffdb067c
Security Headers
Name Value
Strict-Transport-Security max-age=63072000
X-Content-Type-Options nosniff

Request headers

Referer
https://thesideletter.co/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Response headers

date
Fri, 19 Jul 2024 14:20:25 GMT
content-encoding
br
x-content-type-options
nosniff
strict-transport-security
max-age=63072000
x-vercel-ip-latitude
50.4687
age
750558
x-vercel-ip-country
DE
x-vercel-ip-longitude
12.7663
x-vercel-ip-timezone
Europe/Berlin
content-disposition
inline; filename="3af1a6f33e4c4d3b.css"
x-vercel-ip-city
Breitenbrunn
x-vercel-ip-continent
EU
server
Vercel
x-vercel-id
fra1::fr45h-1721398825033-a20e46150e4f
x-matched-path
/_next/static/css/3af1a6f33e4c4d3b.css
etag
W/"f1bba5c0abbc0d19b322e056b64bc68b"
x-vercel-cache
HIT
x-vercel-ip-as-number
28753
content-type
text/css; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
x-vercel-ip-country-region
SN
727d33167af17183.css
thesideletter.co/_next/static/css/
30 KB
5 KB
Stylesheet
General
Full URL
https://thesideletter.co/_next/static/css/727d33167af17183.css
Requested by
Host: thesideletter.co
URL: https://thesideletter.co/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
716043a640b1e8ae1649d1d2f307a7d41ea4fbd0711088d67074b8717edb73bc
Security Headers
Name Value
Strict-Transport-Security max-age=63072000
X-Content-Type-Options nosniff

Request headers

Referer
https://thesideletter.co/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Response headers

date
Fri, 19 Jul 2024 14:20:25 GMT
content-encoding
br
x-content-type-options
nosniff
strict-transport-security
max-age=63072000
x-vercel-ip-latitude
50.4687
age
746410
x-vercel-ip-country
DE
x-vercel-ip-longitude
12.7663
x-vercel-ip-timezone
Europe/Berlin
content-disposition
inline; filename="727d33167af17183.css"
x-vercel-ip-city
Breitenbrunn
x-vercel-ip-continent
EU
server
Vercel
x-vercel-id
fra1::ztjtz-1721398825033-54101f7267e4
x-matched-path
/_next/static/css/727d33167af17183.css
etag
W/"9f8f928eaaed027982390d6a4a559056"
x-vercel-cache
HIT
x-vercel-ip-as-number
28753
content-type
text/css; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
x-vercel-ip-country-region
SN
webpack-c9af07d5a568c5cf.js
thesideletter.co/_next/static/chunks/
40 KB
21 KB
Script
General
Full URL
https://thesideletter.co/_next/static/chunks/webpack-c9af07d5a568c5cf.js
Requested by
Host: thesideletter.co
URL: https://thesideletter.co/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
7061e01912a578baf9821bd476ef8b4691d9d4cb2e842bb760ec56bb141961d6
Security Headers
Name Value
Strict-Transport-Security max-age=63072000
X-Content-Type-Options nosniff

Request headers

Referer
https://thesideletter.co/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Response headers

date
Fri, 19 Jul 2024 14:20:25 GMT
content-encoding
br
x-content-type-options
nosniff
strict-transport-security
max-age=63072000
x-vercel-ip-latitude
50.4687
age
745667
x-vercel-ip-country
DE
x-vercel-ip-longitude
12.7663
x-vercel-ip-timezone
Europe/Berlin
content-disposition
inline; filename="webpack-c9af07d5a568c5cf.js"
x-vercel-ip-city
Breitenbrunn
x-vercel-ip-continent
EU
server
Vercel
x-vercel-id
fra1::ztjtz-1721398825749-55147158f2cc
x-matched-path
/_next/static/chunks/webpack-c9af07d5a568c5cf.js
etag
W/"b00d7ef59f2b9e181eb757c95656f397"
x-vercel-cache
HIT
x-vercel-ip-as-number
28753
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
x-vercel-ip-country-region
SN
fd9d1056-f1a3d20d1f9526f2.js
thesideletter.co/_next/static/chunks/
169 KB
55 KB
Script
General
Full URL
https://thesideletter.co/_next/static/chunks/fd9d1056-f1a3d20d1f9526f2.js
Requested by
Host: thesideletter.co
URL: https://thesideletter.co/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
7b771ade64fbb13c85cecb2411acb1c56fabfb9760c4221027308433745d490d
Security Headers
Name Value
Strict-Transport-Security max-age=63072000
X-Content-Type-Options nosniff

Request headers

Referer
https://thesideletter.co/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Response headers

date
Fri, 19 Jul 2024 14:20:25 GMT
content-encoding
br
x-content-type-options
nosniff
strict-transport-security
max-age=63072000
x-vercel-ip-latitude
50.4687
age
746869
x-vercel-ip-country
DE
x-vercel-ip-longitude
12.7663
x-vercel-ip-timezone
Europe/Berlin
content-disposition
inline; filename="fd9d1056-f1a3d20d1f9526f2.js"
x-vercel-ip-city
Breitenbrunn
x-vercel-ip-continent
EU
server
Vercel
x-vercel-id
fra1::4w6cj-1721398825829-51a50a82e3ef
x-matched-path
/_next/static/chunks/fd9d1056-f1a3d20d1f9526f2.js
etag
W/"04e5f47f2b5d25647dde214c63fc906e"
x-vercel-cache
HIT
x-vercel-ip-as-number
28753
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
x-vercel-ip-country-region
SN
47023-26abf35b8d8d2d43.js
thesideletter.co/_next/static/chunks/
119 KB
33 KB
Script
General
Full URL
https://thesideletter.co/_next/static/chunks/47023-26abf35b8d8d2d43.js
Requested by
Host: thesideletter.co
URL: https://thesideletter.co/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
4f957778dff324600d0701d59e52625c264fda2264d28cb236dc32ca7012b8eb
Security Headers
Name Value
Strict-Transport-Security max-age=63072000
X-Content-Type-Options nosniff

Request headers

Referer
https://thesideletter.co/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Response headers

date
Fri, 19 Jul 2024 14:20:25 GMT
content-encoding
br
x-content-type-options
nosniff
strict-transport-security
max-age=63072000
x-vercel-ip-latitude
50.4687
age
756952
x-vercel-ip-country
DE
x-vercel-ip-longitude
12.7663
x-vercel-ip-timezone
Europe/Berlin
content-disposition
inline; filename="47023-26abf35b8d8d2d43.js"
x-vercel-ip-city
Breitenbrunn
x-vercel-ip-continent
EU
server
Vercel
x-vercel-id
fra1::qhh68-1721398825904-6b9c9d1f3059
x-matched-path
/_next/static/chunks/47023-26abf35b8d8d2d43.js
etag
W/"5d7c63e689d437585161d45e8043895b"
x-vercel-cache
HIT
x-vercel-ip-as-number
28753
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
x-vercel-ip-country-region
SN
main-app-c5eba0675569a4f4.js
thesideletter.co/_next/static/chunks/
475 B
862 B
Script
General
Full URL
https://thesideletter.co/_next/static/chunks/main-app-c5eba0675569a4f4.js
Requested by
Host: thesideletter.co
URL: https://thesideletter.co/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
6653813fba27d1ef4f3118577b8eaaa5697513feaeb22eecff44090a83e32c3f
Security Headers
Name Value
Strict-Transport-Security max-age=63072000
X-Content-Type-Options nosniff

Request headers

Referer
https://thesideletter.co/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Response headers

date
Fri, 19 Jul 2024 14:20:25 GMT
strict-transport-security
max-age=63072000
x-content-type-options
nosniff
x-vercel-ip-latitude
50.4687
age
746283
x-vercel-ip-country
DE
x-vercel-ip-longitude
12.7663
x-vercel-ip-timezone
Europe/Berlin
content-disposition
inline; filename="main-app-c5eba0675569a4f4.js"
x-vercel-ip-city
Breitenbrunn
x-vercel-ip-continent
EU
content-length
475
server
Vercel
x-vercel-id
fra1::992nx-1721398825944-161b9427b078
x-matched-path
/_next/static/chunks/main-app-c5eba0675569a4f4.js
etag
"66d8df3be9987508deb0c7a6627b633d"
x-vercel-cache
HIT
x-vercel-ip-as-number
28753
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
accept-ranges
bytes
x-vercel-ip-country-region
SN
not-found-03862ec4edf0ce4f.js
thesideletter.co/_next/static/chunks/app/main/%5Bsite%5D/%5B%5B...page%5D%5D/
1 KB
932 B
Script
General
Full URL
https://thesideletter.co/_next/static/chunks/app/main/%5Bsite%5D/%5B%5B...page%5D%5D/not-found-03862ec4edf0ce4f.js
Requested by
Host: thesideletter.co
URL: https://thesideletter.co/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
e474143d65d96d6606b3f1b95dbbb9f3238b563e6391b875e8e477c0ec257af4
Security Headers
Name Value
Strict-Transport-Security max-age=63072000
X-Content-Type-Options nosniff

Request headers

Referer
https://thesideletter.co/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Response headers

date
Fri, 19 Jul 2024 14:20:25 GMT
content-encoding
br
x-content-type-options
nosniff
strict-transport-security
max-age=63072000
x-vercel-ip-latitude
50.4687
age
751472
x-vercel-ip-country
DE
x-vercel-ip-longitude
12.7663
x-vercel-ip-timezone
Europe/Berlin
content-disposition
inline; filename="not-found-03862ec4edf0ce4f.js"
x-vercel-ip-city
Breitenbrunn
x-vercel-ip-continent
EU
server
Vercel
x-vercel-id
fra1::5rsz7-1721398825996-89443ffa149e
x-matched-path
/_next/static/chunks/app/main/%5Bsite%5D/%5B%5B...page%5D%5D/not-found-03862ec4edf0ce4f.js
etag
W/"9315a5d0c9e1a6705e1f8d0e32aee030"
x-vercel-cache
HIT
x-vercel-ip-as-number
28753
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
x-vercel-ip-country-region
SN
58563-bdb2091346ff3e82.js
thesideletter.co/_next/static/chunks/
122 KB
35 KB
Script
General
Full URL
https://thesideletter.co/_next/static/chunks/58563-bdb2091346ff3e82.js
Requested by
Host: thesideletter.co
URL: https://thesideletter.co/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
6363330bb5825d5835c59cf08b5255358a4b2d86b4b9781849a64173ac46c631
Security Headers
Name Value
Strict-Transport-Security max-age=63072000
X-Content-Type-Options nosniff

Request headers

Referer
https://thesideletter.co/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Response headers

date
Fri, 19 Jul 2024 14:20:26 GMT
content-encoding
br
x-content-type-options
nosniff
strict-transport-security
max-age=63072000
x-vercel-ip-latitude
50.4687
age
746071
x-vercel-ip-country
DE
x-vercel-ip-longitude
12.7663
x-vercel-ip-timezone
Europe/Berlin
content-disposition
inline; filename="58563-bdb2091346ff3e82.js"
x-vercel-ip-city
Breitenbrunn
x-vercel-ip-continent
EU
server
Vercel
x-vercel-id
fra1::r6ldd-1721398826022-7bc271d42d8b
x-matched-path
/_next/static/chunks/58563-bdb2091346ff3e82.js
etag
W/"30705ee610a89f805ee979ccdeb211fe"
x-vercel-cache
HIT
x-vercel-ip-as-number
28753
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
x-vercel-ip-country-region
SN
66088-e6db615dc7b068d9.js
thesideletter.co/_next/static/chunks/
20 KB
7 KB
Script
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Verdicts & Comments Add Verdict or Comment

19 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.

object| webpackChunk_N_E object| google_tag_manager object| google_tag_data object| dataLayer function| gtag function| onYouTubeIframeAPIReady object| gaGlobal function| clearBlock function| setupEmbeds object| observer object| CustomSubstackWidget object| __next_f object| next object| _N_E object| Prism object| events function| si boolean| sil object| regeneratorRuntime

2 Cookies

Domain/Path Name / Value
.thesideletter.co/ Name: _ga
Value: GA1.1.565622956.1721398827
.thesideletter.co/ Name: _ga_S5EKF045ZG
Value: GS1.1.1721398826.1.0.1721398826.0.0.0

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=63072000

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.

assets-v2.super.so
assets.super.so
joshmillgate.github.io
region1.google-analytics.com
sites.super.so
substackapi.com
thesideletter.co
www.googletagmanager.com
18.245.60.29
2001:4860:4802:32::36
2600:9000:214f:a400:c:2fe1:5000:93a1
2606:4700:3030::ac43:84b1
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2a00:1450:4001:830::2008
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