TCP SYN (p0f)

4:115+13:0:1240:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-09-16 04:31 · last seen 2026-09-16 04:31 · JSON

Decomposed attributes

IP version4
Initial TTL115+13
Options length0
MSS1240
Window sizemss*44
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
t13d2012h1_2b729b4bf6f3_9e7b989ebec81

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.1

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1240_81

User-Agent

fingerprintco-occurrences
curl/8.7.11

Country

fingerprintco-occurrences
JP · Japan1

Network (ASN)

fingerprintco-occurrences
AS2516 · KDDI CORPORATION1