TCP SYN (p0f)

4:55+9:0:1370:mss*47,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-01 14:40 · last seen 2026-07-01 14:40 · JSON

Decomposed attributes

IP version4
Initial TTL55+9
Options length0
MSS1370
Window sizemss*47
Window scale7
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.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06enus_455c03b2c6d8_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64390_2-4-8-1-3_1370_71

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:148.0) Gecko/20100101 Firefox/148.01

Country

fingerprintco-occurrences
US · United States1

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC1