TCP SYN (JA4T)

65535_2-4-1-1-1-3_1360_6

first seen 2026-07-23 18:26 · last seen 2026-10-17 20:25 · 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

TCP window65535
Option kinds2-4-1-1-1-3
MSS1360
Window scale6

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
t13d4412h1_fd39b124ee10_58ed7828516f3
t13d4312h1_c7886603b240_b26ce05bbdd62
t13d1515h1_8daaf6152771_0a20fe35d3a51
t13d1515h1_8daaf6152771_de4a06bb82e31

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.5
ge11nn13enus_9db22d02e17a_000000000000_0000000000002

TCP SYN (p0f)

fingerprintco-occurrences
4:50+14:0:1360:65535,6:mss,sok,nop,nop,nop,ws:df,id+:02
4:44+20:0:1360:65535,6:mss,sok,nop,nop,nop,ws:df,id+:01
4:51+13:0:1360:65535,6:mss,sok,nop,nop,nop,ws:df,id+:01
4:46+18:0:1360:65535,6:mss,sok,nop,nop,nop,ws::01
4:43+21:0:1360:65535,6:mss,sok,nop,nop,nop,ws:df,id+:01
4:46+18:0:1360:65535,6:mss,sok,nop,nop,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.361
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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.5163.147 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.93 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/86.0.4240.99 Safari/537.361

Country

fingerprintco-occurrences
UA · Ukraine2
UZ · Uzbekistan2
HU · Hungary1
LY · Libya1
FJ · Fiji1

Network (ASN)

fingerprintco-occurrences
AS201767 · Uzbektelekom Joint Stock Company2
AS15895 · "Kyivstar" PJSC2
AS213155 · Yettel Hungary Ltd.1
AS328286 · Libyana Mobile Phone Company JSC1
AS38442 · Vodafone Fiji Limited1

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.2