TCP SYN (JA4T)

65535_2-4-8-1-3_1200_6

first seen 2026-07-22 07:14 · last seen 2026-09-04 21:12 · JSON

Distinct clients per day (last 30 days, peak 3/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
MSS1200
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_58ed7828516f14
t13d1515h1_8daaf6152771_0a20fe35d3a53
t13d1515h1_8daaf6152771_de4a06bb82e32

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.14
ge11nn13enus_9db22d02e17a_000000000000_0000000000004
ge11nn14enus_4a2973d235de_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:41+23:0:1200:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:49+15:0:1200:65535,6:mss,sok,ts,nop,ws::03
4:52+12:0:1200:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:51+13:0:1200:65535,6:mss,sok,ts,nop,ws:df,id+:01
4:47+17:0:1200:65535,6:mss,sok,ts,nop,ws:df,id+:01
4:42+22:0:1200:65535,6:mss,sok,ts,nop,ws::01
4:48+16:0:1200:65535,6:mss,sok,ts,nop,ws::01
4:50+14:0:1200:65535,6:mss,sok,ts,nop,ws:df,id+:01
4:44+20:0:1200:65535,6:mss,sok,ts,nop,ws:df,id+:01
4:40+24:0:1200:65535,6: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/119.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.64 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.361
Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.361

Country

fingerprintco-occurrences
BR · Brazil7
IQ · Iraq5
BA · Bosnia & Herzegovina3
TR · Turkey2
PE · Peru2

Network (ASN)

fingerprintco-occurrences
AS59625 · Korek Telecom Company for Communications LLC5
AS25144 · Telekomunikacije Republike Srpske akcionarsko drustvo Banja Luka3
AS267575 · MARANET TELECOM LTDA3
AS266757 · SATELITAL TELECOMUNICACIONES S.A.C2
AS28285 · Beltrãonet Telecomunicações LTDA - EPP1
AS53172 · Next Telecomunicações do Brasil LTDA1
AS268371 · COOPERA TELECOMUNICACOES LTDA1
AS52913 · PLANALTO NET1
AS204457 · Atlantis Telekomunikasyon Bilisim Hizmetleri San. ve Tic. Ltd. Sti.1
AS206375 · NETSPEED INTERNET A.S.1