TCP SYN (p0f)

4:46+18:0:1460:65535,9:mss,nop,nop,sok,nop,ws::0

first seen 2026-07-11 06:57 · last seen 2026-10-30 16:36 · JSON

Last 7 days (6 observations)

Distinct clients per day (last 30 days, peak 2/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	`46+18`
Options length	`0`
MSS	`1460`
Window size	`65535`
Window scale	`9`
Options layout	`mss,nop,nop,sok,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`	57

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn040000_bfa5a9b89dd6_000000000000_000000000000`	32
`ge11nn06en00_3011d71998e2_000000000000_000000000000`	24
`ge10nn030000_dd98166e0881_000000000000_000000000000`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-1-4-1-3_1460_9`	57

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)`	57

Country

fingerprint	co-occurrences
`FI` · Finland	53
`DE` · Germany	4

Network (ASN)

fingerprint	co-occurrences
`AS24940` · Hetzner Online GmbH	53
`AS8560` · IONOS SE	4

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