TCP SYN (p0f)
4:55+9:0:1460:65535,2:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-08-03 17:55 · last seen 2026-10-04 19:25 · JSON
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 | 55+9 |
| Options length | 0 |
| MSS | 1460 |
| Window size | 65535 |
| Window scale | 2 |
| 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 |
|---|---|
t13d2013h1_2b729b4bf6f3_e24568c0d440 | 12 |
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. | 2 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0, curl 7.88.1, curl 8.21.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog. | 12 |
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
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. | 2 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65535_2-4-8-1-3_1460_2 | 14 |
User-Agent
| fingerprint | co-occurrences |
|---|---|
curl/8.21.0 | 12 |
curl/8.5.0 | 2 |
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 14 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS16591 · Google Fiber Inc. | 6 |
AS6079 · RCN | 1 |
AS14593 · Space Exploration Technologies Corporation | 1 |
AS12129 · 123.Net, Inc. | 1 |
AS30600 · Metronet | 1 |
AS4181 · TDS TELECOM | 1 |
AS18596 · Madison Telephone Company | 1 |
AS395466 · Global Net | 1 |
AS395129 · United Electric Cooperative | 1 |