Glossary / domain-availability

Domain Availability

Whether a domain can be registered right now at standard pricing.

A domain is available when no registration exists at the registry — not merely when no website loads. Parked pages, expired-but-in-grace domains, and reserved names all confuse naive checks.

Authoritative verification queries the registry: an RDAP 404 means no registration object exists. DNS-based checks (does the name have NS records?) are fast but weaker — a registered domain can have no DNS, and negative DNS answers can be cached.

DomainFind.ai layers both: RDAP first for registry truth, DNS-over-HTTPS as fallback, with every result labeled by method and confidence score so downstream consumers — human or agent — can decide how much verification they need before purchase.

Related terms

• RDAP (Registration Data Access Protocol) — The modern, HTTPS-based successor to WHOIS that returns structured JSON registration data.
• WHOIS — The legacy port-43 protocol for querying domain registration records, now superseded by RDAP.
• Domain Front-Running — The practice of registering a domain someone searched for before they can buy it.

Put this knowledge to work: check a domain or connect your agent.