TCP SYN (JA4T)
65535_2-4-8-1-3_1380_10
first seen 2026-07-02 22:11 · last seen 2026-09-09 19:47 · JSON
Last 7 days (2 observations)
Distinct clients per day (last 30 days, peak 6/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 | 1380 |
| Window scale | 10 |
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 | 25 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 13 |
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. | 12 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 12 |
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. | 4 |
t13d1516h1_8daaf6152771_1a63afa7c478 | 2 |
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 |
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. | 25 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 20 |
ge20nr13enus_0c2c1d640f3e_000000000000_000000000000 | 8 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 7 |
ge20nr12enca_54b4638ab28b_000000000000_000000000000 | 3 |
ge20nr12enus_54b4638ab28b_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, edge 151.0.4129.93, +36 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
ge20nr13enca_0c2c1d640f3e_000000000000_000000000000 | 1 |
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 |
ge20nr12hr00_54b4638ab28b_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
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. | 5 |
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. | 2 |
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. | 2 |
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 |
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:256|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|11:1:0:256|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|13:1:0:256|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|15:1:0:256|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|17:1:0:256|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|19:1:0:256|m,a,s,p | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
KE · Kenya | 22 |
NG · Nigeria | 13 |
US · United States | 12 |
AE · United Arab Emirates | 9 |
CA · Canada | 4 |
ZA · South Africa | 3 |
EG · Egypt | 2 |
HR · Croatia | 1 |
MA · Morocco | 1 |
KW · Kuwait | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS33771 · Safaricom Limited | 22 |
AS29465 · MTN NIGERIA Communication limited | 13 |
AS3807 · University of Montana | 11 |
AS15802 · Emirates Integrated Telecommunications Company PJSC | 7 |
AS852 · TELUS Communications Inc. | 4 |
AS5384 · Emirates Internet | 2 |
AS37168 · Cell C (Pty) Ltd | 2 |
AS36884 · Wana Corporate | 1 |
AS21928 · T-Mobile USA, Inc. | 1 |
AS8452 · TE-AS | 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 | 4 |