TCP SYN (p0f)

4:119+9:0:1452:mss*44,0:mss,nop,nop,sok:df,id+:0

first seen 2026-08-29 00:34 · last seen 2026-08-29 00:34 · 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

4:119+9:0:1452:mss*44,0:mss,nop,nop,sok:df,id+:0

Mozilla/5.0 (iPad; CPU OS 16_7 like Mac OS X) Ap…

User-Agent claims iOS

TCP SYN initial TTL 119+9 indicates Windows

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 (iPad; CPU OS 16_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.7 Mobile/15E148 Safari/604.1
Observed TTL	119+9 (observed + path distance → initial)
Claimed OS	iOS
Confidence	low — single sighting of an environmental signal

low

2026-08-29

Decomposed attributes

IP version	`4`
Initial TTL	`119+9`
Options length	`0`
MSS	`1452`
Window size	`mss*44`
Window scale	`0`
Options layout	`mss,nop,nop,sok`
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
`t13d2913h1_723694b0fccc_5671b5df5029`	2

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nr11dede_835281d8e5d9_000000000000_000000000000`	1
`ge11nn11dede_835281d8e5d9_000000000000_000000000000`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-1-1-4_1452_00`	2

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (iPad; CPU OS 16_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.7 Mobile/15E148 Safari/604.1`	2

Country

fingerprint	co-occurrences
`DE` · Germany	2

Network (ASN)

fingerprint	co-occurrences
`AS3320` · Deutsche Telekom AG	2