TCP SYN (p0f)

4:50+14:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-15 02:42 · last seen 2026-09-06 06:10 · 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+14:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:0

Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Vers…

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	Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Version/12.14
Observed TTL	50+14 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-06-15

4:50+14:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:0

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:41.0) Gec…

User-Agent claims Windows

TCP SYN initial TTL 50+14 indicates Unix-like

Full User-Agent	Mozilla/5.0 (Windows NT 6.1; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0
Observed TTL	50+14 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-06-15

Distinct clients per day (last 30 days, peak 1/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	`50+14`
Options length	`0`
MSS	`1420`
Window size	`mss*46`
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
`t13d190900_9dc949149365_97f8aa674fd9`	5
`t13d1515h2_1f9c1ec88692_a54fffd0eb61`	1
`t13d1011h1_61a7ad8aa9b6_3a8073edd8ef`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn040000_209bf58f7e8c_000000000000_000000000000`	5
`ge20nr13enus_016d87568c43_000000000000_000000000000`	1
`ge11nr030000_341eb0d8946c_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:139264;2:0;4:121760;5:16384\|12517377\|3:0:0:42\|m,p,a,s`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65320_2-4-8-1-3_1420_10`	2

User-Agent

fingerprint	co-occurrences
`w3m/0.5.1`	1
`Mozilla/5.0 (Linux; Android 9; ONEPLUS A3010) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.111 Mobile Safari/537.36`	1
`Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Version/12.14`	1
`Mozilla/5.0 (Windows NT 6.1; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0`	1
`Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.89 Safari/537.36`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36`	1
`Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.36`	1

Country

fingerprint	co-occurrences
`IN` · India	5
`SG` · Singapore	1
`CA` · Canada	1

Network (ASN)

fingerprint	co-occurrences
`AS396982` · Google LLC	6
`AS5645` · TekSavvy Solutions, Inc.	1