TCP SYN (p0f)

4:45+19:0:1460:mss*44,7:mss,sok,ts,nop,ws::0

first seen 2026-07-02 02:45 · last seen 2026-11-01 02:32 · JSON

Last 7 days (6 observations)

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	`45+19`
Options length	`0`
MSS	`1460`
Window size	`mss*44`
Window scale	`7`
Options layout	`mss,sok,ts,nop,ws`
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
`t12d290700_fc2078a0b8c0_8c06664c3ac5`	64

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn040000_bfa5a9b89dd6_000000000000_000000000000`	30
`ge11nn05en00_61812dc1cc58_000000000000_000000000000`	30
`ge11nn06en00_3011d71998e2_000000000000_000000000000`	2
`ge11nn030000_dd98166e0881_000000000000_000000000000`	2

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_7`	64

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)`	64

Country

fingerprint	co-occurrences
`FR` · France	56
`UA` · Ukraine	8

Network (ASN)

fingerprint	co-occurrences
`AS16276` · OVH SAS	56
`AS13188` · CONTENT DELIVERY NETWORK LTD	8

TLS supported groups

fingerprint	co-occurrences
`001d,0017,0018` Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, winhttp 10.0.20348.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog.	6