TCP SYN (JA4T)

65535_2-4-3-0-0-0_1460_8

first seen 2026-08-29 16:46 · last seen 2026-10-02 23:08 · 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 kinds2-4-3-0-0-0
MSS1460
Window scale8

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
t13d1515h1_8daaf6152771_0a20fe35d3a52

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_0000000000002

TCP SYN (p0f)

fingerprintco-occurrences
4:43+21:0:1460:65535,8:mss,sok,ws,eol+2:df,id+:01
4:49+15:0:1460:65535,8:mss,sok,ws,eol+2: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/120.0.0.0 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

Country

fingerprintco-occurrences
US · United States1
PT · Portugal1

Network (ASN)

fingerprintco-occurrences
AS19108 · Optimum1
AS13156 · NOWO COMMUNICATIONS, S.A.1