TCP SYN (JA4T)

64800_2-1-1-4-1-3_1440_9

first seen 2026-10-01 20:32 · last seen 2026-10-01 20:32 · JSON

Decomposed attributes

TCP window64800
Option kinds2-1-1-4-1-3
MSS1440
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
t13d1715h2_5b57614c22b0_a54fffd0eb611

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn12enus_a72b71f519fc_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
6:48+16:0:1440:mss*45,9:mss,nop,nop,sok,nop,ws:flow:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.01

Country

fingerprintco-occurrences
AT · Austria1

Network (ASN)

fingerprintco-occurrences
AS208323 · Foundation for Applied Privacy1