TCP SYN (JA4T)

64860_2-4-8-1-3_1368_9

first seen 2026-06-30 01:21 · last seen 2026-11-01 00:34 · JSON

Last 7 days (41 observations)

Distinct clients per day (last 30 days, peak 6/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 window64860
Option kinds2-4-8-1-3
MSS1368
Window scale9

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
t13d1712h2_5b57614c22b0_ef7df7f74e48430
t13d1713h2_5b57614c22b0_02c8e53ee39895
t13d1712h2_5b57614c22b0_d5fe2c511efa54

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn060000_ae91ff777030_000000000000_000000000000576
ge20nn06enus_32386ca2063f_000000000000_0000000000003

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;1:4096;8:0;3:1024;4:1048576|25100289|0|a,p,m,s579

TCP SYN (p0f)

fingerprintco-occurrences
4:44+20:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0190
4:43+21:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0160
4:47+17:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0104
4:48+16:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:093
4:42+22:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:016
4:46+18:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:011
4:45+19:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:05

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/537.36; compatible; OAI-SearchBot/1.0; +https://openai.com/searchbot576
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot3

Country

fingerprintco-occurrences
US · United States579

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation579

TLS supported groups

fingerprintco-occurrences
001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, curl 8.7.1.The fingerprint page shows the full measured match list. More on the catalog.108