TCP SYN (JA4T)
65535_2-4-8-1-3_1320_6
first seen 2026-07-22 06:42 · last seen 2026-09-09 07:20 · JSON
Distinct clients per day (last 30 days, peak 2/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 | 1320 |
| 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 |
|---|---|
t13d4412h1_fd39b124ee10_58ed7828516f | 9 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 4 |
t13d1516h1_8daaf6152771_1a63afa7c478 | 1 |
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog. | 9 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 6 |
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 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
BD · Bangladesh | 6 |
GB · United Kingdom | 2 |
XK · Kosovo | 2 |
US · United States | 1 |
BR · Brazil | 1 |
PK · Pakistan | 1 |
AM · Armenia | 1 |
EC · Ecuador | 1 |
AF · Afghanistan | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS134599 · Digital Dot Net (DDN) | 5 |
AS206358 · Qendrim Kryeziu trading as N.P.SH "ISP - Broadcast | 2 |
AS25135 · Vodafone Limited | 2 |
AS14593 · Space Exploration Technologies Corporation | 1 |
AS38562 · Innovative Online Limited | 1 |
AS150750 · IN CABLE INTERNET (PRIVATE) LIMITED | 1 |
AS43733 · Viva Armenia CJSC | 1 |
AS54911 · SMR Communications Inc. | 1 |
AS153975 · Kabul Supply Chain | 1 |
AS266308 · i9NET - PROVEDOR DE INTERNET LTDA - ME | 1 |