ICANN Standardized Registration Data Access Protocol

RDAP Domain Lookup

Retrieve standardized Registration Data Access Protocol (RDAP) information including domain handles, registrar IANA details, DNSSEC delegation, registration events, nameservers, and raw JSON records.

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ICANN Standardized Protocol

Access modern, machine-readable JSON registration records standardized across top gTLD and ccTLD registries.

Nameservers & DNSSEC

Inspect authoritative LDH nameservers, IP address bindings, and cryptographic DNSSEC delegation status.

Entities & Registrars

Parse vCard contacts, IANA Registrar IDs, abuse contact channels, and GDPR privacy redaction indicators.

What is an RDAP Lookup?

RDAP (Registration Data Access Protocol) is ICANN's standardized, modern replacement for the traditional WHOIS protocol. It delivers domain, IP, and ASN registration data over secure HTTPS using structured JSON formats.

Unlike WHOIS text records, RDAP provides consistent field structures, standardized entity roles, vCard contact arrays, internationalized domain support, and native HTTP response codes.

Key Features & Technical Capabilities

  • Standardized JSON Output: Structured responses compatible with web applications and scripts.
  • IANA Endpoint Bootstrap: Automatic server discovery for global top-level domains.
  • Cryptographic DNSSEC & Events: Tracks delegationSigned flags, registration events, and domain age.
  • vCard & Entity Roles: Standardized entity parsing for registrars, registrants, and abuse contacts.
  • Privacy & Redaction Aware: Respects GDPR redaction policies without generating false data.
  • Secure HTTPS Transport: Transmits all data encrypted over port 443 HTTPS endpoints.