TCP SYN (JA4T)

65535_2-4-8-1-3_1440_12

first seen 2026-07-10 15:03 · last seen 2026-07-10 15:03 · JSON

Decomposed attributes

TCP window65535
Option kinds2-4-8-1-3
MSS1440
Window scale12

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
he11nr030000_69803879d94f_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
6:54+10:0:1440:65535,12:mss,sok,ts,nop,ws:flow:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36 (compatible; +https://developers.cloudflare.com/security-center/)1

Country

fingerprintco-occurrences
US · United States1

Network (ASN)

fingerprintco-occurrences
AS132892 · Cloudflare, Inc.1