TCP SYN (JA4T)

8192_2-1-3-4-8_1452_2

first seen 2026-10-11 07:12 · last seen 2026-10-11 07:12 · 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 window8192
Option kinds2-1-3-4-8
MSS1452
Window scale2

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
t13d1516h2_8daaf6152771_e5627efa2ab11

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn12zhcn_616352908365_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:47+17:0:1452:8192,2:mss,nop,ws,sok,ts:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
CN · China1

Network (ASN)

fingerprintco-occurrences
AS9808 · China Mobile Communications Group Co., Ltd.1