TCP SYN (JA4T)
65535_2-1-3-1-1-4_1260_8
first seen 2026-08-30 20:27 · last seen 2026-10-13 01:00 · 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 | 2-1-3-1-1-4 |
| MSS | 1260 |
| 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 |
|---|---|
t13d1010h2_561a47a994ce_4c1ab0552904 | 8 |
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn10enus_d353d425b0bb_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 152.0.1.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
ge20nr10enus_b3034183f430_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +27 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
ge20nr11enus_3901d4197baf_000000000000_000000000000 | 1 |
ge20nn09enus_bfc092dff6c6_000000000000_000000000000 | 1 |
ge20nn14enus_d6f860921a68_000000000000_000000000000 | 1 |
ge20nr16itit_94fdc06e0694_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
1:4096;2:0;3:100;4:131072;5:16384;6:65535|2147418112|3:0:0:42|m,p,a,s | 3 |
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, +58 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
1:4096;2:0;3:100;4:131072;5:16384;6:65535|2147418112|3:0:0:22|m,p,a,s | 2 |
1:4096;2:0;3:100;4:131072;5:16384;6:65535|2147418112|5:0:0:22|m,p,a,s | 1 |
1:4096;2:0;3:100;4:131072;5:16384;6:65535|2147418112|7:0:0:22|m,p,a,s | 1 |
1:4096;2:0;3:100;4:131072;5:16384;6:65535|2147418112|11:0:0:42|m,p,a,s | 1 |
TCP SYN (p0f)
| fingerprint | co-occurrences |
|---|---|
4:110+18:0:1260:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0 | 8 |
4:114+14:0:1260:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0 | 1 |
4:115+13:0:1260:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0 | 1 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
BG · Bulgaria | 8 |
US · United States | 1 |
IT · Italy | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS49882 · Paysafe Holdings UK Limited | 8 |
AS202613 · Aruba S.p.A. | 1 |
AS395266 · Keysight Technologies, Inc | 1 |