No account
Rate-limited, no account. Powered by the same validators as the API.
Syntax, MX, SMTP mailbox probe, disposable/role/free detection and a 0–100 fraud score.
Line type, country, carrier where derivable, and a risk level from numbering-plan data.
Geolocation, ASN/ISP, hosting, VPN/proxy/Tor flags and a risk score.