WHOIS Lookup — Domain & IP RDAP Search
The dnsverifier.com WHOIS Lookup performs a modern RDAP query (the IETF successor to the legacy port-43 WHOIS protocol) with WHOIS fallback, for domains, IPv4, IPv6, and ASNs. It decodes EPP status codes, audits nameserver health, checks DNSSEC, detects privacy-service redaction, draws a registration / transfer / expiry timeline, and supports snapshot-diff to surface changes between scans.
Frequently asked questions
- What is WHOIS?
- WHOIS is a 1982-era TCP/43 protocol that returns registration data for a domain or IP: registrar, registrant (sometimes), creation / expiry dates, nameservers, and contact addresses. Most TLDs now redact personal data to comply with GDPR.
- What is RDAP and how is it different from WHOIS?
- RDAP (Registration Data Access Protocol, RFC 7480-7483) is the JSON-over-HTTPS replacement for WHOIS. It returns structured, machine-readable records; supports authentication for restricted fields; uses standardized status codes; and is served by every TLD registry today. dnsverifier.com prefers RDAP and falls back to legacy WHOIS only when RDAP is unavailable.
- What do EPP status codes like clientTransferProhibited mean?
- EPP (Extensible Provisioning Protocol) status codes are 17 flags a registrar or registry can set on a domain. clientTransferProhibited blocks transfers (a security default), clientHold removes the domain from DNS, serverDeleteProhibited prevents the registry from deleting it. The tool decodes every flag with a one-line explanation.
- How do I check when a domain expires?
- Run the lookup — the timeline panel shows creation, last-updated, transfer, and expiry dates with days-until-expiry. The bulk mode lets you upload up to 30 domains and exports a CSV with one row per domain.
- Why is the registrant data 'redacted for privacy'?
- Since GDPR (2018), most generic TLDs redact personal contact data by default. The actual contact info is held by the registrar; legitimate requests go through the registrar's abuse contact. Privacy-service redactions (Whois Privacy, Domains by Proxy) are detected and labeled.