TCP SYN (JA4T)

65535_2-4-8-1-3_1384_6

first seen 2026-07-22 05:41 · last seen 2026-09-05 05:29 · 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
MSS1384
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_58ed7828516f7
t13d1515h1_8daaf6152771_de4a06bb82e32
t13d1516h1_8daaf6152771_1a63afa7c4781
t13d1515h1_8daaf6152771_0a20fe35d3a51

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.7
ge11nn13enus_9db22d02e17a_000000000000_0000000000003
ge11nn14enus_4a2973d235de_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:41+23:0:1384:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:44+20:0:1384:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:44+20:0:1384:65535,6:mss,sok,ts,nop,ws::02
4:45+19:0:1384:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:40+24:0:1384:65535,6:mss,sok,ts,nop,ws:df,id+:01
4:47+17:0:1384:65535,6:mss,sok,ts,nop,ws:df,id+:01
4:42+22:0:1384:65535,6: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/123.0.0.0 Safari/537.361
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/101.0.4951.67 Safari/537.361
Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.101.4951.54 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.361
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4427.5 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.361

Country

fingerprintco-occurrences
KE · Kenya4
CL · Chile3
AU · Australia1
BR · Brazil1
MX · Mexico1
PR · Puerto Rico1

Network (ASN)

fingerprintco-occurrences
AS36926 · Airtel Networks Kenya Limited4
AS6535 · Telmex Servicios Empresariales S.A.3
AS14638 · Liberty Communications of Puerto Rico LLC1
AS28403 · RadioMovil Dipsa, S.A. de C.V.1
AS268976 · Weclix Telecom S/A1
AS1221 · Telstra Limited1