TCP SYN (p0f)

6:107+21:0:1386:mss*45,8:mss,nop,ws,nop,nop,sok:flow:0

first seen 2026-08-10 10:47 · last seen 2026-08-17 19:19 · JSON

Decomposed attributes

IP version6
Initial TTL107+21
Options length0
MSS1386
Window sizemss*45
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksflow
Payload class0

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
t13d1515h2_8daaf6152771_a54fffd0eb612

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr13enus_016d87568c43_000000000000_0000000000001
ge20nn13enus_016d87568c43_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.2

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-1-3-1-1-4_1386_82

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.02

Country

fingerprintco-occurrences
DE · Germany2

Network (ASN)

fingerprintco-occurrences
AS207781 · Marcel Menzel2