TCP SYN (JA4T)

65535_2-4-8-1-3_1410_10

first seen 2026-07-24 09:55 · last seen 2026-09-09 17:02 · JSON

Distinct clients per day (last 30 days, peak 1/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 kinds2-4-8-1-3
MSS1410
Window scale10

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
t13d1515h1_8daaf6152771_de4a06bb82e33
t13d4412h1_fd39b124ee10_58ed7828516f2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_0000000000003
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.2

TCP SYN (p0f)

fingerprintco-occurrences
4:41+23:0:1410:65535,10:mss,sok,ts,nop,ws:df,id+:02
4:53+11:0:1410:65535,10:mss,sok,ts,nop,ws:df,id+:01
4:43+21:0:1410:65535,10:mss,sok,ts,nop,ws:df,id+:01
4:44+20:0:1410:65535,10:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/90.0.4430.72 Safari/537.361
Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/87.0.4280.88 Safari/537.361

Country

fingerprintco-occurrences
KW · Kuwait2
HU · Hungary1
ZA · South Africa1
PK · Pakistan1

Network (ASN)

fingerprintco-occurrences
AS42961 · Mobile Telecommunications Company K.S.C.P.2
AS9541 · Cyber Internet Services (Pvt) Ltd.1
AS328178 · The Computer Hut cc1
AS204745 · Macronet System Kft1