TCP SYN (JA4T)

65535_2-1-3-4-8_1348_12

first seen 2026-07-02 15:03 · last seen 2026-09-04 01:50 · 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

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)

HTTP request (JA4H)

HTTP/2 frames (Akamai)

TCP SYN (p0f)

User-Agent

Country

Network (ASN)

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).