TCP SYN (p0f)

4:52+12:0:1412:65535,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-30 19:12 · last seen 2026-09-09 17:38 · 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

4:52+12:0:1412:65535,9:mss,sok,ts,nop,ws:df,id+: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/110.0.0.0 Safari/537.36
Observed TTL	52+12 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-09-02

2026-09-05

4:52+12:0:1412:65535,9:mss,sok,ts,nop,ws:df,id+:0

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

User-Agent claims Windows

TCP SYN initial TTL 52+12 indicates Unix-like

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36
Observed TTL	52+12 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-09-09

Distinct clients per day (last 30 days, peak 3/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

IP version	`4`
Initial TTL	`52+12`
Options length	`0`
MSS	`1412`
Window size	`65535`
Window scale	`9`
Options layout	`mss,sok,ts,nop,ws`
Quirks	`df,id+`
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
`t13d1515h1_8daaf6152771_0a20fe35d3a5`	5
`t13d1515h1_8daaf6152771_de4a06bb82e3`	3
`t13d1516h1_8daaf6152771_1a63afa7c478`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn13enus_9db22d02e17a_000000000000_000000000000`	6
`ge11nn14enus_4a2973d235de_000000000000_000000000000`	3

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-4-8-1-3_1412_9`	9

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36`	2
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36`	2
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36`	2
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36`	1
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36`	1

Country

fingerprint	co-occurrences
`MA` · Morocco	3
`PK` · Pakistan	3
`EG` · Egypt	2
`CI` · Côte d’Ivoire	1

Network (ASN)

fingerprint	co-occurrences
`AS17557` · Pakistan Telecommunication Company Limited	3
`AS36925` · MEDITELECOM	1
`AS6713` · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	1
`AS36903` · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	1
`AS37190` · Atlantique Telecom (Cote d'Ivoire)	1
`AS24835` · Vodafone Data	1
`AS8452` · TE-AS	1