TCP SYN (p0f)

4:46+18:0:1300:mss*29,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-10-19 15:11 · last seen 2026-10-19 15:11 · 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

IP version4
Initial TTL46+18
Options length0
MSS1300
Window sizemss*29
Window scale9
Options layoutmss,sok,ts,nop,ws
Quirksdf,id+
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
t13d1011h1_61a7ad8aa9b6_3fcd1a44f3e32

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_cf1edba2959c_000000000000_0000000000001
ge11nr05enus_20ffb2d95d94_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1300_92

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; SEOJuice-SearchBot/1.0; +https://seojuice.io/bot2

Country

fingerprintco-occurrences
FR · France2

Network (ASN)

fingerprintco-occurrences
AS5511 · Orange S.A.2

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, powershell 7.6.8, +1 more.The fingerprint page shows the full measured match list. More on the catalog.2