Domain, WHOIS & RDAP Tools
Public domain identity, RDAP events, resolution and IP/network calculations.
Tools in this collection
RDAP Domain LookupRequest public registration metadata from a standards-based RDAP endpoint.Use tool →WHOIS and RDAP LookupLook up currently public registration details through RDAP; redacted fields stay unknown.Use tool →Domain Age CheckerCalculate an approximate age from an observed RDAP registration event when available.Use tool →Domain Expiration CheckerCheck expiration dates published by the registry through RDAP.Use tool →Public Registrant InformationDisplay only registrant fields the registry actually makes available.Use tool →Domain Registration ComparisonCompare RDAP records for two registered names on one line separated by a comma.Use tool →Hostname to IP LookupResolve hostname A and AAAA addresses through the configured DNS resolver.Use tool →IP to Hostname LookupUse reverse DNS to see whether a valid IP has an observed PTR hostname.Use tool →Reverse DNS LookupReverse-resolve an IPv4 or IPv6 address through a PTR lookup.Use tool →IP Address ValidatorDetect whether a supplied IPv4 or IPv6 address is syntactically valid and public or reserved.Use tool →IPv4 CheckerValidate IPv4 syntax and show the integer representation.Use tool →IPv6 CheckerValidate IPv6 syntax and show its canonical compressed form.Use tool →CIDR Range CalculatorCalculate network address, broadcast, first/last IPv4 host and address count.Use tool →IPv4 Subnet CalculatorDerive netmask, network and IPv4 host capacity from a CIDR block.Use tool →IP Range to CIDR CalculatorDescribe the inclusive numerical span between two supplied IPv4 addresses.Use tool →Reverse IP ClarifierPerform available PTR lookup only; hosting-neighbor discovery requires an external dataset.Use tool →My Public IP AddressDisplay the connecting client IP reported to the application, without geolocation guessing.Use tool →
How to choose a tool
Start with the task you can validate from real public responses or source data. Use the relevant primary evidence and then compare related checks. These tools do not invent live keyword rankings, backlink counts, AI citations, or search volume.