TCP SYN (p0f)
4:42+22:0:1368:65535,6:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-08-15 17:55 · last seen 2026-09-15 06:31 · JSON
Last 7 days (2 observations)
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 | 42+22 |
| Options length | 0 |
| MSS | 1368 |
| Window size | 65535 |
| Window scale | 6 |
| 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 |
|---|---|
t13d3013h2_1d37bd780c83_8537cf56674e | 9 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 2 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
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. | 9 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 2 |
ge11nn13enus_9db22d02e17a_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, +7 more.The fingerprint page shows the full measured match list. More on the catalog. | 9 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65535_2-4-8-1-3_1368_6 | 12 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 12 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS6167 · Verizon Business | 12 |