TCP SYN (p0f)
4:48+16:0:1460:65535,14:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-07-11 00:41 · last seen 2026-10-13 14:15 · JSON
Distinct clients per day (last 30 days, peak 3/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 | 48+16 |
| Options length | 0 |
| MSS | 1460 |
| Window size | 65535 |
| Window scale | 14 |
| 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 |
|---|---|
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. | 5 |
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn060000_2a1d139103bd_000000000000_000000000000 | 5 |
ge11nr040000_e1d2031bdfea_000000000000_000000000000 | 1 |
ge11nn040000_e1d2031bdfea_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65535_2-4-8-1-3_1460_14 | 7 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 5 |
CA · Canada | 2 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS16276 · OVH SAS | 7 |