TCP SYN (JA4T)
65535_2-4-8-1-3_1440_10
first seen 2026-07-01 15:10 · last seen 2026-09-15 03:21 · JSON
Last 7 days (6 observations)
Distinct clients per day (last 30 days, peak 11/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 | 1440 |
| 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 | 71 |
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. | 28 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 27 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 21 |
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. | 8 |
t13d1616h2_86a278354501_eeeea6562960 | 2 |
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t12d1515h2_8daaf6152771_4d8a99c1bc01 | 1 |
t13d1516h1_8daaf6152771_1a63afa7c478 | 1 |
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. | 1 |
HTTP request (JA4H)
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. | 26 |
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. | 7 |
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:22|m,p,a,s | 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 |
1:65536;3:1000;4:6291456;5:16384;6:262144|15663105|0|m,a,s,p | 1 |
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. | 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|3:1:0:256|m,a,s,p | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
BD · Bangladesh | 46 |
ZA · South Africa | 41 |
CN · China | 24 |
PK · Pakistan | 20 |
FR · France | 7 |
KE · Kenya | 7 |
AE · United Arab Emirates | 7 |
US · United States | 6 |
AU · Australia | 2 |
SG · Singapore | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS11845 · Vox Telecom Ltd | 13 |
AS56046 · China Mobile communications corporation | 12 |
AS9541 · Cyber Internet Services (Pvt) Ltd. | 9 |
AS134732 · Dot Internet | 8 |
AS15557 · Societe Francaise Du Radiotelephone - SFR SA | 7 |
AS5384 · Emirates Internet | 7 |
AS328471 · HERO TELECOMS (PTY) LTD | 7 |
AS36926 · Airtel Networks Kenya Limited | 4 |
AS4837 · CHINA UNICOM China169 Backbone | 3 |
AS9808 · China Mobile Communications Group Co., Ltd. | 3 |
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 |
q13d0315h3_55b375c5d22e_dc5437974b47 | 2 |