TCP SYN (JA4T)
65535_2-1-3-1-1-4_1428_8
first seen 2026-09-15 06:08 · last seen 2026-10-09 18:24 · 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 | 2-1-3-1-1-4 |
| MSS | 1428 |
| 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 |
|---|---|
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. | 1 |
t13d3113h2_e8f1e7e78f70_1b3407e2c936 | 1 |
t12d120800_d34a8e72043a_36cef8aed422 | 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 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +39 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge11nr14enus_d644675fec09_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 |
3:100;4:33554432;2:0|33488897|0|m,p,s,a Match?Exact match in Thumbprint's published controlled catalog captures: php-curl 7.88.1, curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
TCP SYN (p0f)
| fingerprint | co-occurrences |
|---|---|
6:118+10:0:1428:65535,8:mss,nop,ws,nop,nop,sok:flow:0 | 1 |
4:99+29:0:1428:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0 | 1 |
6:45+19:0:1428:65535,8:mss,nop,ws,nop,nop,sok:flow:0 | 1 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
BR · Brazil | 1 |
RU · Russia | 1 |
SA · Saudi Arabia | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS12389 · PJSC Rostelecom | 1 |
AS8167 · V tal | 1 |
AS35753 · ITC AS number | 1 |