Look up registration details for a domain, IP address, or ASN. Use Single for one query or Bulk for up to 5 mixed entries at once.
This WHOIS tool supports domain names, IPv4/IPv6 addresses and ASN numbers (e.g. AS15169 or just 15169). Domain lookups return registrar, registration/expiry dates and nameserver info. IP lookups use RDAP to return ASN details, network CIDR ranges and entity/contact information. ASN lookups via bgpview.io return the full announced prefix list, peer count, abuse contacts and RIR allocation details.