TCP SYN (p0f)
4:54+10:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-07-03 16:58 · last seen 2026-09-16 20:06 · JSON
Last 7 days (1570 observations)
Distinct clients per day (last 30 days, peak 20/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 | 54+10 |
| 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 | 15767 |
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn050000_be0d0b335e46_000000000000_000000000000 | 15767 |
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64240_2-4-8-1-3_1460_11 | 15768 |
User-Agent
| fingerprint | co-occurrences |
|---|---|
Mozilla/5.0 (compatible; SemrushBot/7~bl; +http://www.semrush.com/bot.html) | 15767 |
curl/8.5.0 | 1 |
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 15767 |
NL · Netherlands | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS209366 · SEMrush CY LTD | 15767 |
AS210976 · Timeweb, LLP | 1 |