TCP SYN (p0f)

6:243+12:0:1432:mss*45,10:mss,sok,ts,nop,ws:flow:0

first seen 2026-09-07 13:25 · last seen 2026-09-07 13:25 · 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 version6
Initial TTL243+12
Options length0
MSS1432
Window sizemss*45
Window scale10
Options layoutmss,sok,ts,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
t13d5212h1_b262b3658495_8e6e362c5eac Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.19.0, node-fetch 22.23.1, node-fetch 24.21.0, +6 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn07*000_131b6413da1e_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64440_2-4-8-1-3_1432_101

User-Agent

fingerprintco-occurrences
hn-build Bot/1.0 (+directory preview)1

Country

fingerprintco-occurrences
DE · Germany1

Network (ASN)

fingerprintco-occurrences
AS3320 · Deutsche Telekom AG1