TCP SYN (JA4T)

65535_2-4-8-1-3_1350_10

first seen 2026-07-21 16:31 · last seen 2026-10-28 09:22 · JSON

Last 7 days (10 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 kinds2-4-8-1-3
MSS1350
Window scale10

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_58ed7828516f24
t13d1515h1_8daaf6152771_de4a06bb82e322
t13d1515h1_8daaf6152771_0a20fe35d3a519
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.10

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_00000000000025
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.24
ge11nn14enus_4a2973d235de_000000000000_00000000000016
ge11nr19dede_4e9b73ab7510_000000000000_0000000000001
ge11nr19frfr_4e9b73ab7510_000000000000_0000000000001
ge11nr19engb_4e9b73ab7510_000000000000_0000000000001
ge11nr16engb_3dfdba18536b_000000000000_0000000000001
ge11nr18enus_45ed06ef2081_000000000000_0000000000001
ge11nr16zhcn_3dfdba18536b_000000000000_0000000000001
ge11nr15enus_944d72baa157_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:48+16:0:1350:65535,10:mss,sok,ts,nop,ws:df,id+:026
4:47+17:0:1350:65535,10:mss,sok,ts,nop,ws:df,id+:023
4:46+18:0:1350:65535,10:mss,sok,ts,nop,ws:df,id+:010
4:42+22:0:1350:65535,10:mss,sok,ts,nop,ws:df,id+:05
4:41+23:0:1350:65535,10:mss,sok,ts,nop,ws:df,id+:03
4:37+27:0:1350:65535,10:mss,sok,ts,nop,ws:df,id+:02
4:40+24:0:1350:65535,10:mss,sok,ts,nop,ws:df,id+:02
4:39+25:0:1350:65535,10:mss,sok,ts,nop,ws:df,id+:01
4:38+26:0:1350:65535,10:mss,sok,ts,nop,ws:df,id+:01
4:44+20:0:1350:65535,10: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/537.365
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.365
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 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/101.0.4951.67 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 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/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 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

Country

fingerprintco-occurrences
ZA · South Africa75

Network (ASN)

fingerprintco-occurrences
AS29975 · Vodacom75

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.10
0a0a,6399,001d,0017,00181