TCP SYN (JA4T)

65535_2-4-1-1-1-3_1400_8

first seen 2026-07-20 10:11 · last seen 2026-09-14 12:41 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 5/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
MSS1400
Window scale8

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_58ed7828516f22
t13d1515h1_8daaf6152771_de4a06bb82e312
t13d1515h1_8daaf6152771_0a20fe35d3a53

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.22
ge11nn13enus_9db22d02e17a_000000000000_00000000000014
ge11nn14enus_4a2973d235de_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:47+17:0:1400:65535,8:mss,sok,nop,nop,nop,ws:df,id+:011
4:48+16:0:1400:65535,8:mss,sok,nop,nop,nop,ws:df,id+:07
4:46+18:0:1400:65535,8:mss,sok,nop,nop,nop,ws:df,id+:06
4:49+15:0:1400:65535,8:mss,sok,nop,nop,nop,ws:df,id+:05
4:44+20:0:1400:65535,8:mss,sok,nop,nop,nop,ws:df,id+:03
4:42+22:0:1400:65535,8:mss,sok,nop,nop,nop,ws:df,id+:02
4:50+14:0:1400:65535,8:mss,sok,nop,nop,nop,ws:df,id+:01
4:40+24:0:1400:65535,8:mss,sok,nop,nop,nop,ws:df,id+:01
4:43+21:0:1400:65535,8:mss,sok,nop,nop,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/99.0.4844.51 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.362
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/101.0.4951.67 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.361
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.361

Country

fingerprintco-occurrences
NG · Nigeria20
PK · Pakistan9
UZ · Uzbekistan4
PE · Peru3
BD · Bangladesh1

Network (ASN)

fingerprintco-occurrences
AS36873 · Airtel Networks Limited17
AS59257 · CMPak Limited8
AS49273 · COSCOM Liability Limited Company3
AS29465 · MTN NIGERIA Communication limited3
AS262210 · VIETTEL PERÚ S.A.C.3
AS24389 · GrameenPhone Ltd.1
AS56167 · PTML1
AS201767 · Uzbektelekom Joint Stock Company1