TCP SYN (p0f)

4:111+17:0:1360:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-06-23 09:15 · last seen 2026-08-30 22:06 · 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

4:111+17:0:1360:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) …

User-Agent claims macOS

TCP SYN initial TTL 111+17 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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36
Observed TTL	111+17 (observed + path distance → initial)
Claimed OS	macOS
Confidence	low — single sighting of an environmental signal

low

2026-08-30

4:111+17:0:1360:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac…

User-Agent claims iOS

TCP SYN initial TTL 111+17 indicates Windows

Full User-Agent	Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/153.0 Mobile/15E148 Safari/604.1
Observed TTL	111+17 (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	`111+17`
Options length	`0`
MSS	`1360`
Window size	`65535`
Window scale	`8`
Options layout	`mss,nop,ws,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
`t12d180700_4b22cbed5bed_2dae41c691ec`	1
`t13d1516h2_8daaf6152771_806a8c22fdea` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +28 more.The fingerprint page shows the full measured match list. More on the catalog.	1
`t13d2913h1_723694b0fccc_5671b5df5029`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn040000_cf1edba2959c_000000000000_000000000000`	1
`ge20nn13enus_0c2c1d640f3e_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +39 more.The fingerprint page shows the full measured match list. More on the catalog.	1
`ge11nr11lvlv_835281d8e5d9_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:1:0:256\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +60 more.The fingerprint page shows the full measured match list. More on the catalog.	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-3-1-1-4_1360_8`	2

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36`	1
`Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/153.0 Mobile/15E148 Safari/604.1`	1

Country

fingerprint	co-occurrences
`IT` · Italy	1
`BD` · Bangladesh	1
`GH` · Ghana	1

Network (ASN)

fingerprint	co-occurrences
`AS136141` · Mohammad Kamrul Hasan t/a SK Traders	1
`AS16232` · Telecom Italia S.p.A.	1
`AS328494` · 3D WIRELESS PLUS LIMITED	1