TCP SYN (JA4T)
65535_2-4-8-1-3_1420_8
first seen 2026-07-02 21:14 · last seen 2026-10-30 05:35 · JSON
Last 7 days (27 observations)
Distinct clients per day (last 30 days, peak 20/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 | 1420 |
| 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 |
|---|---|
t13d4412h1_fd39b124ee10_58ed7828516f | 76 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 50 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 33 |
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog. | 27 |
t13d4312h1_c7886603b240_b26ce05bbdd6 | 8 |
t13d1516h1_8daaf6152771_1a63afa7c478 | 5 |
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, +28 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
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 |
t13d1517h2_8daaf6152771_b1ff8ab2d16f | 1 |
t13d1513h2_8daaf6152771_eca864cca44a | 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. | 84 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 56 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 32 |
ge11nr19enus_4e9b73ab7510_000000000000_000000000000 | 6 |
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. | 3 |
ge11nr17zhtw_021c223ca66c_000000000000_000000000000 | 2 |
ge11nr19zhtw_4e9b73ab7510_000000000000_000000000000 | 2 |
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 |
ge20nn030000_80b089f68b8e_000000000000_000000000000 | 1 |
ge20nr13enus_e2ac93ffb364_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. | 4 |
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 |
4:16777216|16711681|0|m,p,a,s | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
BR · Brazil | 34 |
PK · Pakistan | 33 |
SN · Senegal | 25 |
VN · Vietnam | 16 |
BD · Bangladesh | 10 |
PT · Portugal | 8 |
MX · Mexico | 7 |
KZ · Kazakhstan | 7 |
KE · Kenya | 6 |
IE · Ireland | 4 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS8346 · SONATEL-AS Autonomous System | 25 |
AS17557 · Pakistan Telecommunication Company Limited | 16 |
AS21299 · Kar-Tel LLC | 7 |
AS2860 · NOS COMUNICACOES, S.A. | 6 |
AS7552 · Viettel Group | 6 |
AS45899 · VNPT Corp | 6 |
AS9541 · Cyber Internet Services (Pvt) Ltd. | 6 |
AS18403 · FPT Telecom Company | 4 |
AS6830 · Liberty Global Europe Holding B.V. | 4 |
AS15399 · Wananchi Group (Kenya) Limited | 4 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 157.0, firefox 157.0.1, +5 more.The fingerprint page shows the full measured match list. More on the catalog. | 27 |
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 156.0.8078.48, edge 155.0.4283.62, chrome 156.0.8078.47, +11 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
0a0a,001d,0017,0018 | 2 |