TCP SYN (p0f)

4:42+22:0:1414:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-11 17:03 · last seen 2026-06-11 17:03 · JSON

Decomposed attributes

IP version4
Initial TTL42+22
Options length0
MSS1414
Window sizemss*20
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
t13d3613h2_018971650b2c_e7e754ef087b1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn040000_88d30a62b7ad_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:33554432;2:0|33488897|0|m,p,s,a Match?Exact match in Thumbprint's published controlled catalog captures: php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.1

User-Agent

fingerprintco-occurrences
curl/7.61.11

Country

fingerprintco-occurrences
JP · Japan1

Network (ASN)

fingerprintco-occurrences
AS17506 · ARTERIA Networks Corporation1