TCP SYN (JA4T)
65535_2-4-8-1-3_1360_10
first seen 2026-06-29 23:11 · last seen 2026-09-05 15:19 · JSON
Distinct clients per day (last 30 days, peak 7/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 | 1360 |
| 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 |
|---|---|
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. | 14 |
t13d4412h1_fd39b124ee10_58ed7828516f | 10 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 9 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 6 |
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. | 3 |
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. | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nr07enus_25c0b7f80d39_000000000000_000000000000 | 14 |
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. | 10 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 10 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 5 |
ge20nn04enus_1f85cee3b49d_000000000000_000000000000 | 3 |
ge20nr13itit_32e5e6a142da_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
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. | 3 |
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. | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 17 |
PK · Pakistan | 8 |
BD · Bangladesh | 4 |
IT · Italy | 3 |
RO · Romania | 2 |
NP · Nepal | 2 |
ML · Mali | 2 |
ZA · South Africa | 1 |
OM · Oman | 1 |
CI · Côte d’Ivoire | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS24499 · Telenor Pakistan | 7 |
AS52393 · Corporación Dana S.A. | 3 |
AS16232 · Telecom Italia S.p.A. | 3 |
AS394474 · WhiteLabelColo | 3 |
AS8708 · DIGI ROMANIA S.A. | 2 |
AS263735 · SOCIEDAD BUENA HOSTING, S.A. | 2 |
AS397477 · WGIX | 2 |
AS263740 · Corporacion Laceibanetsociety | 2 |
AS52485 · networksdelmanana.com | 2 |
AS23752 · Nepal Telecommunications Corporation, Internet Services, | 2 |
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 | 3 |