TCP SYN (JA4T)
65535_2-4-8-1-3_1357_6
first seen 2026-08-15 18:26 · last seen 2026-09-04 04:24 · 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
| TCP window | 65535 |
|---|---|
| Option kinds | 2-4-8-1-3 |
| MSS | 1357 |
| Window scale | 6 |
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 | 1 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 1 |
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. | 1 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 1 |
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. | 1 |
TCP SYN (p0f)
| fingerprint | co-occurrences |
|---|---|
4:51+13:0:1357:65535,6:mss,sok,ts,nop,ws:df,id+:0 | 1 |
4:52+12:0:1357:65535,6:mss,sok,ts,nop,ws:df,id+:0 | 1 |
4:54+10:0:1357:65535,6:mss,sok,ts,nop,ws:df,id+:0 | 1 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 2 |
NZ · New Zealand | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS174 · Cogent Communications, LLC | 2 |
AS137409 · GSL Networks Pty LTD | 1 |