TCP SYN (JA4T)

65535_2-4-8-1-3_1450_6

first seen 2026-07-21 22:59 · last seen 2026-09-05 09:47 · JSON

Distinct clients per day (last 30 days, peak 7/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
MSS1450
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_58ed7828516f19
t13d1515h1_8daaf6152771_de4a06bb82e313
t13d1515h1_8daaf6152771_0a20fe35d3a58
t13d1516h1_8daaf6152771_1a63afa7c4783

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.19
ge11nn13enus_9db22d02e17a_000000000000_00000000000017
ge11nn14enus_4a2973d235de_000000000000_0000000000007

TCP SYN (p0f)

fingerprintco-occurrences
4:45+19:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:011
4:47+17:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:07
4:41+23:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:06
4:42+22:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:06
4:44+20:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:05
4:43+21:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:46+18:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:51+13:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:01
4:49+15:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:01
4:53+11:0:1450:65535,6: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/131.0.0.0 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.362
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/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.362
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/119.0.0.0 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

Country

fingerprintco-occurrences
BR · Brazil25
AR · Argentina14
IN · India1
IT · Italy1
AL · Albania1
DO · Dominican Republic1

Network (ASN)

fingerprintco-occurrences
AS28201 · Companhia Itabirana Telecomunicações Ltda18
AS7303 · Telecom Argentina S.A.14
AS262669 · Companhia Itabirana Telecomunicações Ltda5
AS35047 · Abissnet sh.a.1
AS138754 · Kerala Vision Broad Band Private Limited1
AS267593 · TELLIUS & ALLNET TELECOMUNICAÇÕES DAS AMÉRICAS1
AS274035 · ARCOFIBER CONEXIONES SRL (RODRITEL)1
AS210218 · Open Fiber S.P.A.1
AS266536 · CENTRALNET LTDA - ME1