TCP SYN (p0f)

4:51+13:0:1460:mss*29,14:mss,nop,ws:df,id+:0

first seen 2026-07-18 00:18 · last seen 2026-07-18 00:18 · JSON

Decomposed attributes

IP version4
Initial TTL51+13
Options length0
MSS1460
Window sizemss*29
Window scale14
Options layoutmss,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.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_4c6fd23d173c_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-1-3_1460_141

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:115.0) Gecko/20100101 Firefox/115.01

Country

fingerprintco-occurrences
US · United States1

Network (ASN)

fingerprintco-occurrences
AS6939 · Hurricane Electric LLC1