TCP SYN (p0f)

4:39+25:0:1300:mss*44,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-01 17:10 · last seen 2026-07-01 17:10 · JSON

Decomposed attributes

IP version4
Initial TTL39+25
Options length0
MSS1300
Window sizemss*44
Window scale10
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
t13d1713h1_ab0a1bf427ad_ecd0401ec68b Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_3658ef221638_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.21.4, wget 1.25.0, wget 1.21.3.The fingerprint page shows the full measured match list. More on the catalog.1
he11nn050000_3658ef221638_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1300_102

User-Agent

fingerprintco-occurrences
markethunt2/0.1 (+research)2

Country

fingerprintco-occurrences
DE · Germany2

Network (ASN)

fingerprintco-occurrences
AS207957 · SERV.HOST GROUP LTD2