TCP SYN (JA4T)
65535_2-4-8-1-3_1412_10
first seen 2026-07-06 10:34 · last seen 2026-10-30 12:40 · JSON
Last 7 days (36 observations)
Distinct clients per day (last 30 days, peak 19/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 | 1412 |
| 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 | 168 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 66 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 62 |
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. | 30 |
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. | 12 |
t13d1516h1_8daaf6152771_1a63afa7c478 | 10 |
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. | 2 |
t13d4312h1_c7886603b240_b26ce05bbdd6 | 1 |
t13d491200_bd868743f55c_7c76daad20ec Match?Exact match in Thumbprint's published controlled catalog captures: java-urlconnection 17.0.12.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, +57 more.The fingerprint page shows the full measured match list. More on the catalog. | 14 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
ZA · South Africa | 109 |
PK · Pakistan | 83 |
KE · Kenya | 57 |
NP · Nepal | 16 |
MA · Morocco | 9 |
CI · Côte d’Ivoire | 9 |
EG · Egypt | 8 |
TG · Togo | 8 |
DZ · Algeria | 5 |
MU · Mauritius | 5 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS33771 · Safaricom Limited | 34 |
AS20011 · Dimension Data | 27 |
AS9541 · Cyber Internet Services (Pvt) Ltd. | 24 |
AS37611 · AFRIHOST SP (PTY) LTD | 20 |
AS36924 · GVA Cote d'Ivoire SAS | 14 |
AS17557 · Pakistan Telecommunication Company Limited | 13 |
AS37049 · SADV (Pty) Ltd | 12 |
AS36994 · Vodacom | 12 |
AS328961 · NET99 (PTY) LTD | 9 |
AS11845 · Vox Telecom Ltd | 8 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 30 |
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 9 |
0a0a,001d,0017,0018 | 3 |
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. | 1 |
0a0a,6399,001d,0017,0018 | 1 |