TCP SYN (p0f)
4:47+17:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-06-29 23:11 · last seen 2026-09-10 13:00 · JSON
Last 7 days (19 observations)
Distinct clients per day (last 30 days, peak 13/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 | 47+17 |
| Options length | 0 |
| MSS | 1460 |
| Window size | mss*44 |
| Window scale | 11 |
| 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 |
|---|---|
t13d311000_8ae6a2f5ac15_5ac7197df9d2 | 20 |
t12d1814h2_29a2cd9e9f10_d267a5f792d4 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn050000_be0d0b335e46_000000000000_000000000000 | 20 |
ge20nn020000_ac270bc2c19a_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
1:65536;4:131072;5:16384|12517377|3:0:0:201,5:0:0:101,7:0:0:1,9:0:7:1,11:0:3:1,13:0:0:241|m,p,a,s | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64240_2-4-8-1-3_1460_11 | 21 |
User-Agent
| fingerprint | co-occurrences |
|---|---|
Mozilla/5.0 (compatible; SemrushBot/7~bl; +http://www.semrush.com/bot.html) | 20 |
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0 | 1 |
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 20 |
DE · Germany | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS209366 · SEMrush CY LTD | 20 |
AS24940 · Hetzner Online GmbH | 1 |