*** WELCOME to about.rdapserver.org *** the friendly home of the RDAP server lookup *** now with the ccTLD coverage IANA leaves out *** point your RDAP client at a single URL *** it's SMALL DATA and it's ALL IN ONE PLACE ***

> WHAT IS RDAP?

RDAP (Registration Data Access Protocol, RFC 7480–7484) is the modern replacement for WHOIS. To look a domain up you first need to know which server answers for its TLD.

> WHAT IS THIS?

IANA publishes a canonical bootstrap file, but it lists only some ccTLDs — each ccTLD is self-governed, so most are missing. This project adds a small, hand-maintained overlay for those gaps and serves both from a single URL.

> THE RECIPE

  1. The IANA bootstrap stays canonical for everything it covers.
  2. The overlay is a delta: only the TLDs IANA omits.
  3. IANA always wins — when IANA adds a ccTLD itself, the overlay quietly defers.
  4. IDNs are punycoded to their A-label (xn--) before lookup.

> USE IT

$ rdap-lookup example.com
example.com	.com	https://rdap.verisign.com/com/v1/

$ rdap-lookup --server-only nic.ch
nic.ch	.ch	https://rdap.nic.ch/

> THE DATA

> NO RDAP?

Not every ccTLD runs an RDAP server. When none is known, fall back to WHOIS — you'll find whois_server alongside rdap_server in the full data.