TCP SYN (p0f)

4:44+20:0:1362:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-09-21 01:43 · last seen 2026-09-21 01:43 · JSON

Decomposed attributes

IP version4
Initial TTL44+20
Options length0
MSS1362
Window size65535
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
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
t13d2013h1_2b729b4bf6f3_e24568c0d4402

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0, curl 7.88.1, curl 8.21.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1362_82

User-Agent

fingerprintco-occurrences
curl/8.19.02

Country

fingerprintco-occurrences
GB · United Kingdom2

Network (ASN)

fingerprintco-occurrences
AS2856 · British Telecommunications Limited2