TCP SYN (p0f)

4:53+11:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-20 05:49 · last seen 2026-09-07 05:20 · JSON

Distinct clients per day (last 30 days, peak 2/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 TTL53+11
Options length0
MSS1460
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
t13d311200_e8f1e7e78f70_d339722ba4af22
t13d3515h1_8f004308c246_5c2c66f702b02
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06enus_3ce581af28ff_000000000000_00000000000022
ge11nn040000_88d30a62b7ad_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn030000_0db47b7d240d_000000000000_0000000000001
po11nn070000_ce951b014b9b_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_922

User-Agent

fingerprintco-occurrences
StartmeBot/1.0 (+https://start.me/bot)22
Mozilla/5.0 (compatible; Infrawatch/1.0; +https://infrawat.ch/)2
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.361

Country

fingerprintco-occurrences
US · United States22
DE · Germany2
NL · Netherlands1

Network (ASN)

fingerprintco-occurrences
AS14618 · Amazon.com, Inc.22
AS25369 · Hydra Communications Ltd2
AS215925 · VPSVAULT.HOST LTD1