TCP SYN (JA4T)
65535_2-4-8-1-3_1394_9
first seen 2026-07-27 13:54 · last seen 2026-08-30 10:22 · 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 | 1394 |
| Window scale | 9 |
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 |
|---|---|
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +24 more.The fingerprint page shows the full measured match list. More on the catalog. | 39 |
t13d1616h2_86a278354501_eeeea6562960 | 7 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 1 |
HTTP request (JA4H)
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, +43 more.The fingerprint page shows the full measured match list. More on the catalog. | 12 |
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +21 more.The fingerprint page shows the full measured match list. More on the catalog. | 7 |
1:65536;2:0;4:6291456;6:262144|15663105|7:1:0:220|m,a,s,p | 4 |
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:256|m,a,s,p | 4 |
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
1:65536;2:0;4:6291456;6:262144|15663105|13:1:0:256|m,a,s,p | 2 |
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:42|m,p,a,s | 2 |
1:4096;2:0;4:32768;5:16384|12517377|9:0:0:22|m,p,a,s | 2 |
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 133.0.6943.16, chrome 150.0.7871.128, chromium 148.0.7778.96, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p | 1 |
TCP SYN (p0f)
| fingerprint | co-occurrences |
|---|---|
4:50+14:0:1394:65535,9:mss,sok,ts,nop,ws:df,id+:0 | 46 |
4:52+12:0:1394:65535,9:mss,sok,ts,nop,ws:df,id+:0 | 1 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
TR · Turkey | 46 |
NP · Nepal | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS15924 · Vodafone Net Iletisim Hizmetler AS | 46 |
AS141767 · C G Communications Ltd | 1 |
Cross-transport links
TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).
| fingerprint | linked observations |
|---|---|
q13d0311h3_55b375c5d22e_653d80c3fe9d | 10 |
q13d0315h3_55b375c5d22e_dc5437974b47 | 2 |