TCP SYN (p0f)

4:112+16:0:1460:62727,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-31 23:02 · last seen 2026-07-31 23:02 · 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

4:112+16:0:1460:62727,10:mss,sok,ts,nop,ws:df,id+:0

Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_8 like M…

User-Agent claims iOS

TCP SYN initial TTL 112+16 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 (iPhone; CPU iPhone OS 18_7_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Mobile/15E148 Safari/604.1
Observed TTL	112+16 (observed + path distance → initial)
Claimed OS	iOS
Confidence	low — single sighting of an environmental signal

low

2026-07-31

Decomposed attributes

IP version	`4`
Initial TTL	`112+16`
Options length	`0`
MSS	`1460`
Window size	`62727`
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
`t13d1114h2_5e2a75874763_89e9e4bb3419`	2
`t13d1516h2_8daaf6152771_d8a2da3f94cd` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nn020000_b89ce445e0b3_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.1, go-net/http 1.27.3, +14 more.The fingerprint page shows the full measured match list. More on the catalog.	1
`ge20nn020000_fb4f949fd323_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.9, powershell 7.6.8.The fingerprint page shows the full measured match list. More on the catalog.	1
`ge20nn120000_48520df6af75_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`4:16777216\|16711681\|0\|m,p,a,s`	2
`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
`62727_2-4-8-1-3_1460_10`	3

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Mobile/15E148 Safari/604.1`	2
`okhttp/5.3.0`	1

Country

fingerprint	co-occurrences
`US` · United States	3

Network (ASN)

fingerprint	co-occurrences
`AS14618` · Amazon.com, Inc.	3