TCP SYN (JA4T)
65535_2-4-8-1-3_1339_8
first seen 2026-07-03 08:18 · last seen 2026-09-05 14:26 · JSON
Distinct clients per day (last 30 days, peak 1/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 | 1339 |
| Window scale | 8 |
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 | 9 |
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. | 4 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 2 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 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. | 9 |
ge20nr13enus_b3e540f310f0_000000000000_000000000000 | 3 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 2 |
ge20nr14enus_e6dae214b9be_000000000000_000000000000 | 1 |
ge11nn14enus_4a2973d235de_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. | 2 |
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. | 1 |
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. | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
TG · Togo | 5 |
TR · Turkey | 4 |
MX · Mexico | 2 |
LV · Latvia | 1 |
CO · Colombia | 1 |
ET · Ethiopia | 1 |
CI · Côte d’Ivoire | 1 |
SY · Syria | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS24691 · TogoTelecom, Togo | 5 |
AS20978 · TT Mobil Iletisim Hizmetleri A.S | 4 |
AS265540 · ALTAN REDES, S.A.P.I. de C. V. | 2 |
AS1257 · Tele2 Sverige AB | 1 |
AS29571 · Orange Côte d'Ivoire | 1 |
AS26611 · COMUNICACIÓN CELULAR S.A. COMCEL S.A. | 1 |
AS328988 · SAFARICOM TELECOMMUNICATIONS ETHIOPIA PLC | 1 |
AS214707 · RCell LLC | 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 | 3 |