Finding the Authoritative Registration Data (RDAP) Service

Registration Data Access Protocol (RDAP) Query Format

“…The base URLs used to construct RDAP queries are maintained in an IANA registry described in [RFC7484]. Queries are formed by retrieving an appropriate base URL from the registry and appending a path segment specified in either Sections 3.1 or 3.2.…”

HTTP Usage in the Registration Data Access Protocol (RDAP)

“…Bootstrapping is discussed in [RFC7484]. In constrained environments, the processes outlined in [RFC7484] may not be viable, and there may be the need for servers acting as a "redirector".…”