TCP SYN (JA4T)

16384_2-1-1-4-1-3-1-1-8_1460_6

first seen 2026-08-17 23:32 · last seen 2026-08-17 23:32 · 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 window16384
Option kinds2-1-1-4-1-3-1-1-8
MSS1460
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
t13d1110h2_a6024cdc75c2_5603904660151
t13d1310h2_8eff73aa554a_5603904660151

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn04enus_989c7cc05c9b_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p2

TCP SYN (p0f)

fingerprintco-occurrences
4:46+18:0:1460:16384,6:mss,nop,nop,sok,nop,ws,nop,nop,ts:df,id+:01
4:53+11:0:1460:16384,6:mss,nop,nop,sok,nop,ws,nop,nop,ts: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/135.0.0.4 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.1 Safari/537.361

Country

fingerprintco-occurrences
NO · Norway2

Network (ASN)

fingerprintco-occurrences
AS56655 · Gigahost AS2