TCP SYN (JA4T)
64240_2-1-3-1-1-4_1284_8
first seen 2026-08-31 14:54 · last seen 2026-10-04 14:08 · 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 | 64240 |
|---|---|
| Option kinds | 2-1-3-1-1-4 |
| MSS | 1284 |
| Window scale | 8 |
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 |
|---|---|
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 156.0.8078.48, chrome 154.0.8037.57, +27 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d1613h2_1711a4c0508c_65df7edfe3b3 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn13ruru_9519c2577190_000000000000_000000000000 | 1 |
ge20nn14ruru_9c5aa737a9ec_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +60 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
4:33554432;1:65536;2:0;4:33554432;6:262144|33488897|1:1:0:256|m,a,s,p | 1 |
TCP SYN (p0f)
| fingerprint | co-occurrences |
|---|---|
4:115+13:0:1284:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0 | 1 |
4:114+14:0:1284:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0 | 1 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
PL · Poland | 1 |
EE · Estonia | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS209693 · OC NETWORKS LIMITED | 1 |
AS203273 · NetCrafters OU | 1 |