TCP SYN (p0f)

6:45+19:0:1440:65535,9:mss,nop,nop,sok,nop,ws:flow:0

first seen 2026-09-07 08:07 · last seen 2026-10-31 04:34 · JSON

Last 7 days (2 observations)

Decomposed attributes

IP version6
Initial TTL45+19
Options length0
MSS1440
Window size65535
Window scale9
Options layoutmss,nop,nop,sok,nop,ws
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
t12d290700_fc2078a0b8c0_8c06664c3ac57

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06en00_3011d71998e2_000000000000_0000000000006
ge11nn040000_bfa5a9b89dd6_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-1-4-1-3_1440_97

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)7

Country

fingerprintco-occurrences
FR · France5
FI · Finland2

Network (ASN)

fingerprintco-occurrences
AS51167 · Contabo GmbH5
AS24940 · Hetzner Online GmbH2

TLS supported groups

fingerprintco-occurrences
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, winhttp 10.0.20348.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog.2