as those operating the +31, +41, +43, +44 and +48 country codes. EPP authInfo "codes" or "keys" are also required in the transfer of generic top-level domain names between registrars (.com, .net, .org, .biz, .info). .com and .net domain names only began requiring the EPP key from fourth quarter 2006. Current EPP Status Codes References Related RFCs RFC 3375 - Generic Registry-Registrar Protocol Requirements RFC 3735 - Guidelines for Extending EPP RFC 3915 - Domain Registry Grace Period Mapping (e.g. Add Grace Period, Redemption Grace Period) RFC 4114 - Using EPP for ENUM addresses RFC 5910 - Domain Name System (DNS) Security Extensions Mapping for the Extensible Provisioning Protocol (EPP) (obsoletes RFC 4310, DNSSEC) RFC 5730 - Extensible Provisioning Protocol (EPP) (obsoletes RFC 4930, which obsoleted RFC 3730) RFC 5731 - Extensible Provisioning Protocol (EPP) Domain Name Mapping (obsoletes RFC 4931) RFC 5732 - Extensible Provisioning Protocol (EPP) Host Mapping (obsoletes RFC 4932) RFC 5733 - Extensible Provisioning Protocol (EPP) Contact Mapping (obsoletes RFC 4933) RFC 5734 - Extensible Provisioning Protocol (EPP) Transport over TCP (obsoletes RFC 4934) RFC 8543 - Extensible Provisioning Protocol (EPP) Organization Mapping RFC 8544 - Organization Extension for the Extensible Provisioning Protocol (EPP) Adoption IETF Implementation Report for RFCs 4930-4934. (This includes a list of top-level domain registries that have implemented EPP.) Domain Name System XML-based standards