TCP SYN (p0f)

4:108+20:0:1400:mss*44,8:mss,nop,ws,nop,nop,sok::0

first seen 2026-09-09 23:23 · last seen 2026-09-09 23:37 · JSON

Decomposed attributes

IP version4
Initial TTL108+20
Options length0
MSS1400
Window sizemss*44
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
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_e24568c0d4405

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.5

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1400_85

User-Agent

fingerprintco-occurrences
curl/8.18.05

Country

fingerprintco-occurrences
JP · Japan5

Network (ASN)

fingerprintco-occurrences
AS4725 · SoftBank Corp.5