TCP SYN (JA4T)
65535_2-4-1-1-1-1-1-1-1-1-1-1-1-3_1400_9
first seen 2026-07-14 05:16 · last seen 2026-09-08 01:56 · JSON
Distinct clients per day (last 30 days, peak 3/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 | 2-4-1-1-1-1-1-1-1-1-1-1-1-3 |
| MSS | 1400 |
| Window scale | 9 |
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 | 10 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 7 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 6 |
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 |
t13d1516h1_8daaf6152771_1a63afa7c478 | 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. | 10 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 9 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 5 |
ge20nr12idid_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. | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
NG · Nigeria | 11 |
BD · Bangladesh | 5 |
PK · Pakistan | 5 |
BR · Brazil | 1 |
ID · Indonesia | 1 |
OM · Oman | 1 |
BW · Botswana | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS36873 · Airtel Networks Limited | 11 |
AS24389 · GrameenPhone Ltd. | 5 |
AS56167 · PTML | 5 |
AS4761 · INDOSAT Internet Network Provider | 1 |
AS50010 · Omani Qatari Telecommunication Company SAOC | 1 |
AS26599 · TELEFÔNICA BRASIL S.A | 1 |
AS36963 · Orange Botswana (PTY) Ltd | 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 | 1 |