TCP SYN (p0f)

4:122+6:0:1420:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-07-27 20:43 · last seen 2026-07-27 20:43 · JSON

Decomposed attributes

IP version4
Initial TTL122+6
Options length0
MSS1420
Window size65535
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksdf,id+,ecn
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
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
po11nn050000_a9e6c43a0296_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1420_81

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; CVE-2026-63030-checker)1

Country

fingerprintco-occurrences
US · United States1

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC1