TCP SYN (JA4T)

64860_2-4-8-1-3_1340_7

first seen 2026-07-19 03:56 · last seen 2026-07-21 19:34 · JSON

Decomposed attributes

TCP window64860
Option kinds2-4-8-1-3
MSS1340
Window scale7

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
t13d4913h2_bd868743f55c_aac3338551363
t13d1812h1_85036bcba153_d41ae481755e1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr12engb_f8a3a1e39dc3_000000000000_0000000000002
he11nn040000_e1d2031bdfea_000000000000_0000000000001
ge20nn13engb_3698ed0fb8b4_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:1000;2:0;4:6291456;1:4096|15663105|0|s,m,p,a3

TCP SYN (p0f)

fingerprintco-occurrences
4:50+14:0:1340:mtu*47,7:mss,sok,ts,nop,ws:df,id+:03
4:53+11:0:1340:mtu*47,7:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.31

Country

fingerprintco-occurrences
GB · United Kingdom3
US · United States1

Network (ASN)

fingerprintco-occurrences
AS39351 · 31173 Services AB3
AS212238 · Datacamp Limited1