urlscan.io logo urlscan.io
SecurityTrails logo

admin.housefinder.nl Open in urlscan Pro
199.59.243.226  Public Scan

Go To Rescan Add Verdict Report
URL: https://admin.housefinder.nl/
Submission: On July 30 via api from US — Scanned from NL
 Behaviour Indicators
Similar DOM Content API
Verdicts

Summary

This website contacted 5 IPs in 3 countries across 5 domains to perform 10 HTTP transactions. The main IP is 199.59.243.226, located in United States and belongs to AMAZON-02, US. The main domain is admin.housefinder.nl.
TLS certificate: Issued by R10 on July 30th 2024. Valid for: 3 months.
This is the only time admin.housefinder.nl was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
4 199.59.243.226 16509 (AMAZON-02)
1 2a01:7c8:aac6... 20857 (TRANSIP-A...)
1 142.250.186.132 15169 (GOOGLE)
1 172.217.16.194 15169 (GOOGLE)
3 2a00:1450:400... 15169 (GOOGLE)
10 5
4    199.59.243.226 (United States)

ASN16509 (AMAZON-02, US)
admin.housefinder.nl
1    2a01:7c8:aac6:311:5054:ff:feeb:156b (Netherlands)

ASN20857 (TRANSIP-AS Amsterdam, the Netherlands, NL)
www2.dnfs24.com
1    142.250.186.132 (United States)

ASN15169 (GOOGLE, US)
PTR: fra24s07-in-f4.1e100.net
www.google.com
1    172.217.16.194 (United States)

ASN15169 (GOOGLE, US)
PTR: fra16s08-in-f2.1e100.net
partner.googleadservices.com
3    2a00:1450:4001:828::200e (Frankfurt am Main, Germany)

ASN15169 (GOOGLE, US)
syndicatedsearch.goog
Apex Domain
Subdomains		 Transfer
4 housefinder.nl
admin.housefinder.nl
41 KB
3 syndicatedsearch.goog
syndicatedsearch.goog — Cisco Umbrella Rank: 6209
722 B
1 googleadservices.com
partner.googleadservices.com — Cisco Umbrella Rank: 5754
265 B
1 google.com
www.google.com — Cisco Umbrella Rank: 10
76 KB
1 dnfs24.com
www2.dnfs24.com
10 5
Domain Requested by
4 admin.housefinder.nl admin.housefinder.nl
3 syndicatedsearch.goog www.google.com
1 partner.googleadservices.com www.google.com
1 www.google.com admin.housefinder.nl
1 www2.dnfs24.com admin.housefinder.nl
10 5

This site contains no links.

Subject Issuer Validity Valid
admin.housefinder.nl
R10		 2024-07-30 -
2024-10-28		 3 months crt.sh
www2.dnfs24.com
E6		 2024-07-22 -
2024-10-20		 3 months crt.sh
*.google.com
WR2		 2024-07-01 -
2024-09-23		 3 months crt.sh
*.googleadservices.com
WR2		 2024-07-01 -
2024-09-23		 3 months crt.sh
syndicatedsearch.goog
WR2		 2024-07-01 -
2024-09-23		 3 months crt.sh

This page contains 3 frames:

Primary Page: https://admin.housefinder.nl/
Frame ID: E4807CBBD24D2D2D6EEBE82E2B4F6458
Requests: 8 HTTP requests in this frame

Frame: https://www2.dnfs24.com/iframe/housefinder.nl
Frame ID: EAFD6D385F9347FA37A25649E7CCF06C
Requests: 1 HTTP requests in this frame

Frame: https://syndicatedsearch.goog/afs/ads?adtest=off&psid=3113057640&pcsa=false&channel=pid-bodis-gcontrol47%2Cpid-bodis-gcontrol309%2Cpid-bodis-gcontrol439%2Cpid-bodis-gcontrol151%2Cpid-bodis-gcontrol202&client=dp-bodis31_3ph&r=m&hl=nl&ivt=0&rpbu=https%3A%2F%2Fadmin.housefinder.nl%2F%3Fcaf%3D1%26bpt%3D345&max_radlink_len=50&type=3&uiopt=false&swp=as-drid-2595524770179053&oe=UTF-8&ie=UTF-8&fexp=21404%2C17301437%2C17301439%2C17301442%2C17301511%2C17301516%2C17301266&format=r3&nocache=2161722333184104&num=0&output=afd_ads&domain_name=admin.housefinder.nl&v=3&bsl=8&pac=0&u_his=1&u_tz=120&dt=1722333184104&u_w=1600&u_h=1200&biw=1600&bih=1200&psw=1600&psh=1080&frm=0&uio=-&cont=rs&drt=0&jsid=caf&nfp=1&jsv=652824369&rurl=https%3A%2F%2Fadmin.housefinder.nl%2F
Frame ID: B264BE57427A44B71E43F3EFEC23DF56
Requests: 1 HTTP requests in this frame

Screenshot
Live screenshot
Full Image

Page Title

housefinder.nl

Page URL History Show full URLs

  1. https://admin.housefinder.nl/ HTTP 307
    https://admin.housefinder.nl/ Page URL

Page Statistics

10
Requests

100 %
HTTPS

40 %
IPv6

5
Domains

5
Subdomains

5
IPs

3
Countries

118 kB
Transfer

236 kB
Size

2
Cookies

Page URL History

This captures the URL locations of the websites, including HTTP redirects and client-side redirects via JavaScript or Meta fields.

  1. https://admin.housefinder.nl/ HTTP 307
    https://admin.housefinder.nl/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

10 HTTP transactions

Resource
Path		 Size
x-fer		 Type
MIME-Type
Primary Request /
admin.housefinder.nl/
Redirect Chain
  • https://admin.housefinder.nl/
  • https://admin.housefinder.nl/
1 KB
2 KB 		Document
General
Check archive.org
Download Go to
Full URL
https://admin.housefinder.nl/
Protocol
HTTP/1.1
Security
TLS 1.3, , AES_128_GCM
Server
199.59.243.226 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
/
Resource Hash
de2c00ee1a4eed1d8e9232bbb880ae19737697c7f4f7a177f4e412617083b9f5

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Response headers

Accept-Ch
sec-ch-prefers-color-scheme
Cache-Control
no-store, max-age=0
Connection
close
Content-Length
1062
Content-Type
text/html; charset=utf-8
Critical-Ch
sec-ch-prefers-color-scheme
Date
Tue, 30 Jul 2024 09:53:03 GMT
Vary
sec-ch-prefers-color-scheme
X-Adblock-Key
MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBANDrp2lz7AOmADaN8tA50LsWcjLFyQFcb/P2Txc58oYOeILb3vBw7J6f4pamkAQVSQuqYsKx3YzdUHCvbVZvFUsCAwEAAQ==_VIGVX0jR8JAZelPQTYlylX8RmMHY2ZeRAetfJaYBu0XBaRvnOgYa4kz38gvVxe/6S+Ei+u+9z9wc3s48AVdSfQ==
X-Request-Id
033cd32d-edc7-444c-8b38-7c700cc144a5

Redirect headers

Location
https://admin.housefinder.nl/
bukNYBzfi.js
admin.housefinder.nl/ 		33 KB
33 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://admin.housefinder.nl/bukNYBzfi.js
Requested by
Host: admin.housefinder.nl
URL: https://admin.housefinder.nl/
Protocol
HTTP/1.1
Security
TLS 1.3, , AES_128_GCM
Server
199.59.243.226 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
/
Resource Hash
b0754afe500a24201f740ed9c023d64483ca9183fa6361d759bb329462d25344

Request headers

Referer
https://admin.housefinder.nl/
sec-ch-prefers-color-scheme
light
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Response headers

Date
Tue, 30 Jul 2024 09:53:03 GMT
Connection
close
Content-Length
33929
X-Request-Id
8313cdac-76ad-40e0-a1a6-e5b4b42e8ec6
Content-Type
application/javascript; charset=utf-8
_fd
admin.housefinder.nl/ 		6 KB
6 KB 		Fetch
General
Check archive.org
Download Go to
Full URL
https://admin.housefinder.nl/_fd
Requested by
Host: admin.housefinder.nl
URL: https://admin.housefinder.nl/bukNYBzfi.js
Protocol
HTTP/1.1
Security
TLS 1.3, , AES_128_GCM
Server
199.59.243.226 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
/
Resource Hash
43728840d9d1c3490dee5a6b0910cc79edf44515bc91d8ef3dde7e7c8e87db2b

Request headers

Accept
application/json
Referer
https://admin.housefinder.nl/
sec-ch-prefers-color-scheme
light
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36
Content-Type
application/json

Response headers

Date
Tue, 30 Jul 2024 09:53:03 GMT
Connection
close
Content-Length
5633
X-Request-Id
cf0519ed-448b-4287-bf13-bcb663bb2472
Content-Type
application/json; charset=utf-8
housefinder.nl
www2.dnfs24.com/iframe/ Frame EAFD 		0
0 		Document
General
Check archive.org
Download Go to
Full URL
https://www2.dnfs24.com/iframe/housefinder.nl
Requested by
Host: admin.housefinder.nl
URL: https://admin.housefinder.nl/bukNYBzfi.js
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:7c8:aac6:311:5054:ff:feeb:156b , Netherlands, ASN20857 (TRANSIP-AS Amsterdam, the Netherlands, NL),
Reverse DNS
Software
nginx /
Resource Hash
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains
X-Content-Type-Options nosniff
X-Xss-Protection 1; mode=block

Request headers

Referer
https://admin.housefinder.nl/
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Response headers

cache-control
no-cache, private
content-encoding
gzip
content-type
text/html; charset=UTF-8
date
Tue, 30 Jul 2024 09:53:04 GMT
server
nginx
strict-transport-security
max-age=31536000; includeSubDomains
vary
Accept-Encoding
x-content-type-options
nosniff
x-xss-protection
1; mode=block
caf.js
www.google.com/adsense/domains/ 		196 KB
76 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://www.google.com/adsense/domains/caf.js?abp=1&bodis=true
Requested by
Host: admin.housefinder.nl
URL: https://admin.housefinder.nl/bukNYBzfi.js
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
142.250.186.132 , United States, ASN15169 (GOOGLE, US),
Reverse DNS
fra24s07-in-f4.1e100.net
Software
sffe /
Resource Hash
5f223b49fb4b74357e23c8c0c90263ca0b648c409bb25c30dc36dfb6dcaea1fd
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Xss-Protection 0

Request headers

Referer
https://admin.housefinder.nl/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Response headers

date
Tue, 30 Jul 2024 09:53:04 GMT
content-encoding
gzip
x-content-type-options
nosniff
content-security-policy-report-only
require-trusted-types-for 'script'; report-uri https://csp.withgoogle.com/csp/ads-afs-ui
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
x-xss-protection
0
server
sffe
cross-origin-opener-policy
same-origin; report-to="ads-afs-ui"
etag
"9987097496463688059"
vary
Accept-Encoding
report-to
{"group":"ads-afs-ui","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/ads-afs-ui"}]}
content-type
text/javascript; charset=UTF-8
cache-control
private, max-age=3600
accept-ranges
bytes
link
<https://syndicatedsearch.goog>; rel="preconnect"
expires
Tue, 30 Jul 2024 09:53:04 GMT
cookie.js
partner.googleadservices.com/gampad/ 		382 B
265 B 		Script
General
Check archive.org
Download Go to
Full URL
https://partner.googleadservices.com/gampad/cookie.js?domain=admin.housefinder.nl&client=partner-dp-bodis31_3ph&product=SAS&callback=__sasCookie
Requested by
Host: www.google.com
URL: https://www.google.com/adsense/domains/caf.js?abp=1&bodis=true
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
172.217.16.194 , United States, ASN15169 (GOOGLE, US),
Reverse DNS
fra16s08-in-f2.1e100.net
Software
cafe /
Resource Hash
5c5d2dad54965b51f316dd990cb45ec09dc88a3a41e557bbff8ae347703857bf
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Xss-Protection 0

Request headers

Referer
https://admin.housefinder.nl/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Response headers

date
Tue, 30 Jul 2024 09:53:04 GMT
content-encoding
gzip
x-content-type-options
nosniff
server
cafe
p3p
policyref="https://www.googleadservices.com/pagead/p3p.xml", CP="NOI DEV PSA PSD IVA IVD OTP OUR OTR IND OTC"
content-type
text/javascript; charset=UTF-8
cache-control
private
cross-origin-resource-policy
cross-origin
content-disposition
attachment; filename="f.txt"
timing-allow-origin
*
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
content-length
243
x-xss-protection
0
ads
syndicatedsearch.goog/afs/ Frame B264 		0
0 		Document
General
Check archive.org
Download Go to
Full URL
https://syndicatedsearch.goog/afs/ads?adtest=off&psid=3113057640&pcsa=false&channel=pid-bodis-gcontrol47%2Cpid-bodis-gcontrol309%2Cpid-bodis-gcontrol439%2Cpid-bodis-gcontrol151%2Cpid-bodis-gcontrol202&client=dp-bodis31_3ph&r=m&hl=nl&ivt=0&rpbu=https%3A%2F%2Fadmin.housefinder.nl%2F%3Fcaf%3D1%26bpt%3D345&max_radlink_len=50&type=3&uiopt=false&swp=as-drid-2595524770179053&oe=UTF-8&ie=UTF-8&fexp=21404%2C17301437%2C17301439%2C17301442%2C17301511%2C17301516%2C17301266&format=r3&nocache=2161722333184104&num=0&output=afd_ads&domain_name=admin.housefinder.nl&v=3&bsl=8&pac=0&u_his=1&u_tz=120&dt=1722333184104&u_w=1600&u_h=1200&biw=1600&bih=1200&psw=1600&psh=1080&frm=0&uio=-&cont=rs&drt=0&jsid=caf&nfp=1&jsv=652824369&rurl=https%3A%2F%2Fadmin.housefinder.nl%2F
Requested by
Host: www.google.com
URL: https://www.google.com/adsense/domains/caf.js?abp=1&bodis=true
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:4001:828::200e Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
gws /
Resource Hash
Security Headers
Name Value
Content-Security-Policy object-src 'none';base-uri 'self';script-src 'nonce-wi9dO3LRvWRicsTfhUTLFg' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/gws/other
X-Xss-Protection 0

Request headers

Referer
https://admin.housefinder.nl/
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Response headers

alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
cache-control
private, max-age=3600
content-disposition
inline
content-encoding
br
content-length
2585
content-security-policy
object-src 'none';base-uri 'self';script-src 'nonce-wi9dO3LRvWRicsTfhUTLFg' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/gws/other
content-type
text/html; charset=UTF-8
cross-origin-opener-policy
same-origin-allow-popups; report-to="gws"
date
Tue, 30 Jul 2024 09:53:04 GMT
expires
Tue, 30 Jul 2024 09:53:04 GMT
report-to
{"group":"gws","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/gws/other"}]}
server
gws
x-xss-protection
0
_tr
admin.housefinder.nl/ 		2 B
300 B 		Fetch
General
Check archive.org
Download Go to
Full URL
https://admin.housefinder.nl/_tr
Requested by
Host: admin.housefinder.nl
URL: https://admin.housefinder.nl/bukNYBzfi.js
Protocol
HTTP/1.1
Security
TLS 1.3, , AES_128_GCM
Server
199.59.243.226 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
/
Resource Hash
2689367b205c16ce32ed4200942b8b8b1e262dfc70d9bc9fbc77c49699a4f1df

Request headers

Accept
application/json
Referer
https://admin.housefinder.nl/
sec-ch-prefers-color-scheme
light
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36
Content-Type
application/json

Response headers

Date
Tue, 30 Jul 2024 09:53:04 GMT
Connection
close
Content-Length
2
X-Request-Id
ee69de0f-6cc4-4da3-86f8-76b8946253e6
Content-Type
application/json; charset=utf-8
gen_204
syndicatedsearch.goog/afs/ 		0
510 B 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://syndicatedsearch.goog/afs/gen_204?client=dp-bodis31_3ph&output=uds_ads_only&zx=sjhqxjugp4q&aqid=ALioZo_2Ddq0ovsPrsjquQc&psid=3113057640&pbt=bs&adbx=450&adby=181&adbh=480&adbw=700&adbah=153%2C153%2C153&adbn=master-1&eawp=partner-dp-bodis31_3ph&errv=652824369&csala=3%7C0%7C203%7C103%7C9&lle=0&ifv=1&hpt=0
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:4001:828::200e Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
gws /
Resource Hash
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
Security Headers
Name Value
Content-Security-Policy object-src 'none';base-uri 'self';script-src 'nonce-ZozbLPl7SFGBMChJSSUKEQ' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/gws/other
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0

Request headers

Referer
https://admin.housefinder.nl/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Response headers

content-security-policy
object-src 'none';base-uri 'self';script-src 'nonce-ZozbLPl7SFGBMChJSSUKEQ' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/gws/other
date
Tue, 30 Jul 2024 09:53:05 GMT
server
gws
cross-origin-opener-policy
same-origin-allow-popups; report-to="gws"
x-frame-options
SAMEORIGIN
report-to
{"group":"gws","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/gws/other"}]}
content-type
text/html; charset=UTF-8
permissions-policy
unload=()
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
content-length
0
x-xss-protection
0
gen_204
syndicatedsearch.goog/afs/ 		0
212 B 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://syndicatedsearch.goog/afs/gen_204?client=dp-bodis31_3ph&output=uds_ads_only&zx=qbwj75eizhgs&aqid=ALioZo_2Ddq0ovsPrsjquQc&psid=3113057640&pbt=bv&adbx=450&adby=181&adbh=480&adbw=700&adbah=153%2C153%2C153&adbn=master-1&eawp=partner-dp-bodis31_3ph&errv=652824369&csala=3%7C0%7C203%7C103%7C9&lle=0&ifv=1&hpt=0
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:4001:828::200e Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
gws /
Resource Hash
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
Security Headers
Name Value
Content-Security-Policy object-src 'none';base-uri 'self';script-src 'nonce-FtkGr8sYCNOmRtobVPIqlw' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/gws/other
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0

Request headers

Referer
https://admin.housefinder.nl/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Response headers

content-security-policy
object-src 'none';base-uri 'self';script-src 'nonce-FtkGr8sYCNOmRtobVPIqlw' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/gws/other
date
Tue, 30 Jul 2024 09:53:06 GMT
server
gws
cross-origin-opener-policy
same-origin-allow-popups; report-to="gws"
x-frame-options
SAMEORIGIN
report-to
{"group":"gws","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/gws/other"}]}
content-type
text/html; charset=UTF-8
permissions-policy
unload=()
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
content-length
0
x-xss-protection
0

Verdicts & Comments Add Verdict or Comment

9 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| 0 object| 1 string| park object| version object| __parkour number| googleNDT_ number| googleAltLoader object| google function| __sasCookie

2 Cookies

Domain/Path Name / Value
admin.housefinder.nl/ Name: parking_session
Value: 893659d2-6e56-40f0-9f3f-c6da6c02f5bb
.housefinder.nl/ Name: __gsas
Value: ID=e8c957c344b69944:T=1722333184:RT=1722333184:S=ALNI_MaacBIeVzTyVhOAlyXd7o3KdqqK-w