TCP SYN (JA4T)

42340_2-4-8-1-3_1452_6

first seen 2026-09-08 07:30 · last seen 2026-10-18 11:50 · 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 window42340
Option kinds2-4-8-1-3
MSS1452
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
t13d1515h1_8daaf6152771_de4a06bb82e34
t13d4312h1_c7886603b240_b26ce05bbdd62
t13d1515h1_8daaf6152771_0a20fe35d3a52
t13d1516h1_8daaf6152771_1a63afa7c4781

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_0000000000007
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
4:43+21:0:1452:mss*29,6:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1452:mss*29,6:mss,sok,ts,nop,ws:df,id+:02
4:47+17:0:1452:mss*29,6:mss,sok,ts,nop,ws:df,id+:02
4:51+13:0:1452:mss*29,6:mss,sok,ts,nop,ws:df,id+:01
4:45+19:0:1452:mss*29,6:mss,sok,ts,nop,ws:df,id+:01
4:42+22:0:1452:mss*29,6:mss,sok,ts,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/123.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.362
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/120.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 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

Country

fingerprintco-occurrences
TR · Turkey2
TH · Thailand1
HU · Hungary1
ES · Spain1
VN · Vietnam1
AL · Albania1
HN · Honduras1
XK · Kosovo1

Network (ASN)

fingerprintco-occurrences
AS5483 · Magyar Telekom Plc.1
AS7552 · Viettel Group1
AS9121 · Turk Telekomunikasyon Anonim Sirketi1
AS34984 · Superonline Iletisim Hizmetleri A.S.1
AS57269 · DIGI SPAIN TELECOM S.A1
AS42313 · ONE ALBANIA SH.A.1
AS17552 · True Online1
AS269729 · GRUPO MULTICABLES DE CORTES S.R.L de C.V1
AS203675 · VISTA SH.P.K.1

TLS supported groups

fingerprintco-occurrences
0a0a,001d,0017,00181