TCP SYN (p0f)

4:50+14:0:1440:65535,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-24 03:33 · last seen 2026-07-30 01:43 · 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

4:50+14:0:1440:65535,10: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 50+14 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/101.0.4951.67 Safari/537.36
Observed TTL	50+14 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-07-29

4:50+14:0:1440:65535,10:mss,sok,ts,nop,ws:df,id+:0

Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 …

User-Agent claims Windows

TCP SYN initial TTL 50+14 indicates Unix-like

Full User-Agent	Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.16 Safari/537.36
Observed TTL	50+14 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-07-25

4:50+14:0:1440:65535,10:mss,sok,ts,nop,ws:df,id+:0

Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWe…

User-Agent claims Windows

TCP SYN initial TTL 50+14 indicates Unix-like

Full User-Agent	Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36
Observed TTL	50+14 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-07-30

Decomposed attributes

IP version	`4`
Initial TTL	`50+14`
Options length	`0`
MSS	`1440`
Window size	`65535`
Window scale	`10`
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
`t13d4412h1_fd39b124ee10_58ed7828516f`	6

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn050000_b223a0ebb0b5_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.	6

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-4-8-1-3_1440_10`	6

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.36`	1
`Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.16 Safari/537.36`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/88.0.4324.152 Safari/537.36`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.3538.77 Safari/537.36`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/86.0.4240.99 Safari/537.36`	1
`Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36`	1

Country

fingerprint	co-occurrences
`PK` · Pakistan	4
`ZA` · South Africa	1
`NP` · Nepal	1

Network (ASN)

fingerprint	co-occurrences
`AS132165` · Connect Communications	2
`AS136969` · KK Networks (Pvt) Ltd.	1
`AS150750` · IN CABLE INTERNET (PRIVATE) LIMITED	1
`AS37680` · Cool Ideas Service Provider (Pty) Ltd	1
`AS149866` · Super Sitapaila Cable Net Pvt. Ltd	1