TCP SYN (p0f)

4:43+21:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:0

first seen 2026-06-12 10:08 · last seen 2026-06-20 17:44 · JSON

Decomposed attributes

IP version	`4`
Initial TTL	`43+21`
Options length	`0`
MSS	`1460`
Window size	`mss*5`
Window scale	`10`
Options layout	`mss,sok,ts,nop,ws`
Quirks	`df,id+,ecn`
Payload class	`0`

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)

fingerprint	co-occurrences
`t13i131000_f57a46bbacb6_ab7e3b40a677`	1
`t13d1312h2_f57a46bbacb6_ab7e3b40a677` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +5 more.The fingerprint page shows the full measured match list. More on the catalog.	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nr030000_0db47b7d240d_000000000000_000000000000`	1
`ge11nn030000_042112399351_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`2:0;4:4194304;5:16384;6:10485760\|1073741824\|0\|a,m,p,s` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog.	1

User-Agent

fingerprint	co-occurrences
`curl/7.64.1`	1
`curl/7.74.0`	1

Country

fingerprint	co-occurrences
`MY` · Malaysia	2

Network (ASN)

fingerprint	co-occurrences
`AS45102` · Alibaba (US) Technology Co., Ltd.	2