TCP SYN (JA4T)
65535_2-4-8-1-3_1460_10
first seen 2026-07-01 14:34 · last seen 2026-09-16 06:52 · JSON
Last 7 days (16 observations)
Distinct clients per day (last 30 days, peak 13/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 | 1460 |
| 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 | 72 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 33 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 24 |
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. | 21 |
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. | 19 |
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. | 15 |
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 152.0.7977.64, chrome 152.0.7977.65, +5 more.The fingerprint page shows the full measured match list. More on the catalog. | 14 |
t13d3113h2_e8f1e7e78f70_ce5650b735ce | 12 |
t13d1714h1_5b57614c22b0_43ade6aba3df | 8 |
t13d1514h2_8daaf6152771_a664a5d17759 | 5 |
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. | 74 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 43 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 19 |
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. | 16 |
ge20nr12zhcn_54b4638ab28b_000000000000_000000000000 | 13 |
ge20nr05enus_d0c4616abeb5_000000000000_000000000000 | 9 |
ge20nr14enau_01af10667d18_000000000000_000000000000 | 8 |
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog. | 7 |
ge20nn13zhcn_0c2c1d640f3e_000000000000_000000000000 | 5 |
ge10nr040000_532a1ee47909_000000000000_000000000000 | 4 |
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. | 30 |
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. | 22 |
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. | 16 |
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.The fingerprint page shows the full measured match list. More on the catalog. | 12 |
1:65536;3:1000;4:6291456;5:16384;6:262144|15663105|0|m,a,s,p | 8 |
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. | 6 |
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. | 4 |
4:16777216|16711681|0|m,p,a,s | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 78 |
ZA · South Africa | 31 |
HK · Hong Kong SAR China | 22 |
KE · Kenya | 22 |
NG · Nigeria | 14 |
GB · United Kingdom | 11 |
SG · Singapore | 10 |
CI · Côte d’Ivoire | 10 |
DE · Germany | 9 |
SN · Senegal | 9 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS46997 · Black Mesa Corporation | 14 |
AS400072 · THUNDERBOX INC | 13 |
AS14593 · Space Exploration Technologies Corporation | 12 |
AS55286 · B2 Net Solutions Inc. | 12 |
AS36924 · GVA Cote d'Ivoire SAS | 12 |
AS204071 · DEBEE Network | 10 |
AS36873 · Airtel Networks Limited | 9 |
AS134972 · IKUUU NETWORK LTD | 9 |
AS37061 · Safaricom Limited | 8 |
AS5713 · Telkom SA Ltd. | 6 |
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 |
q13d0312h3_55b375c5d22e_178839b6cec1 | 2 |