TCP SYN (p0f)

4:107+21:0:1460:65535,8:mss,nop,ws,sok,ts:df,id+:0

first seen 2026-08-27 18:53 · last seen 2026-10-18 18:35 · JSON

Distinct clients per day (last 30 days, peak 2/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

IP version4
Initial TTL107+21
Options length0
MSS1460
Window size65535
Window scale8
Options layoutmss,nop,ws,sok,ts
Quirksdf,id+
Payload class0

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprintco-occurrences
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 154.0.8037.57, chrome 152.0.7977.64, +24 more.The fingerprint page shows the full measured match list. More on the catalog.9
t13d1617h2_86a278354501_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.3, +10 more.The fingerprint page shows the full measured match list. More on the catalog.3
t13d1515h1_8daaf6152771_0a20fe35d3a51

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn14ruru_3fb598f484fb_000000000000_0000000000003
ge20nn15ruru_74941313fa48_000000000000_0000000000003
ge20nn16ruru_aedc7d5591f1_000000000000_0000000000003
ge20nr13ruru_9e2b86631664_000000000000_0000000000002
ge11nn13enus_9db22d02e17a_000000000000_0000000000001
ge20nn13ruru_9e2b86631664_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +57 more.The fingerprint page shows the full measured match list. More on the catalog.4
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.3
1:65536;2:0;4:6291456;6:262144|15663105|7:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144|15663105|11:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144|15663105|17:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144|15663105|23:1:0:256|m,a,s,p1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-4-8_1460_813

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/155.0.0.0 Safari/537.369
Mozilla/5.0 (Android 13; Mobile; rv:153.0) Gecko/153.0 Firefox/153.02
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.01

Country

fingerprintco-occurrences
RU · Russia13

Network (ASN)

fingerprintco-occurrences
AS35807 · SkyNet Ltd.9
AS25513 · PJSC Moscow city telephone network2
AS8359 · MTS PJSC1
AS50596 · Informatsionnye Tekhnologii LLC1

TLS supported groups

fingerprintco-occurrences
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.2
0a0a,001d,0017,00181