TCP SYN (p0f)

6:52+12:0:8440:mss*7,7:mss,sok,ts,nop,ws:flow:0

first seen 2026-07-24 11:27 · last seen 2026-07-24 11:27 · JSON

Inconsistencies

User-Agents observed with this fingerprint that contradict what it proves at the wire. all inconsistencies →

fingerprint User-Agent claims wire shows confidence seen first seen last seen

6:52+12:0:8440:mss*7,7:mss,sok,ts,nop,ws:flow:0

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleW…

User-Agent claims Windows

TCP SYN initial TTL 52+12 indicates Unix-like

The initial TTL is set by the sending kernel (64 on Unix-like systems, 128 on Windows) and survives NAT. But VPNs, proxies and tunnels legitimately replace the sending stack, so this check never exceeds medium confidence.

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Observed TTL	52+12 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-07-24

Decomposed attributes

IP version	`6`
Initial TTL	`52+12`
Options length	`0`
MSS	`8440`
Window size	`mss*7`
Window scale	`7`
Options layout	`mss,sok,ts,nop,ws`
Quirks	`flow`
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
`t13d191000_9dc949149365_e7c285222651`	2

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn05enus_f3bb7aa45ec4_000000000000_000000000000`	1
`he11nn020000_818f42cc3fd7_000000000000_000000000000`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`59080_2-4-8-1-3_8440_7`	2

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36`	1
`Mozilla/5.0 CMS-Detector/1.0`	1

Country

fingerprint	co-occurrences
`US` · United States	2

Network (ASN)

fingerprint	co-occurrences
`AS63949` · Akamai Connected Cloud	2