Extension Identifier,Registry Operator,Specification,Contact,Intended Usage
arin_originas0,[ARIN],[https://bitbucket.org/arin-specs/arin-rdap-originas/src/master/arin-rdap-originas.txt],[ARIN],COMMON
artRecord,.ART,[https://gitlab.centralnic.com/centralnic/centralnic-rdap-extensions/blob/master/art-records.md],[CentralNic_Ltd],COMMON
autnums,Any,[RFC-ietf-regext-rdap-rir-search-19],[IETF],This extension identifier is used for INR-specific search operations.
autnumSearchResults,Any,[RFC-ietf-regext-rdap-rir-search-19],[IETF],This extension identifier is used for INR-specific search operations.
cidr0,Various RIRs under the NRO,[https://bitbucket.org/nroecg/nro-rdap-cidr/src/master/nro-rdap-cidr.txt],[ARIN],COMMON
farv1,Any,[RFC9560],[IETF],This extension describes version 1 of a federated authentication method for RDAP using OAuth 2.0 and OpenID Connect.
fred,[CZ.NIC_z._s._p._o.],[https://fred.nic.cz/rdap-extension/],[Jaromir_Talir],FRED is open source domain registry system that includes RDAP server. This RDAP server provides some extended features defined in specification.
geofeed1,Any,[RFC-ietf-regext-rdap-geofeed-14],[IETF],This extension describes version 1 of a method to access the IP geolocation feed data through RDAP.
icann_rdap_response_profile_0,ICANN,[https://www.icann.org/gtld-rdap-profile],[ICANN],COMMON
icann_rdap_response_profile_1,ICANN,[https://www.icann.org/en/system/files/files/rdap-response-profile-21feb24-en.pdf],[ICANN],COMMON
icann_rdap_technical_implementation_guide_0,ICANN,[https://www.icann.org/gtld-rdap-profile],[ICANN],COMMON
icann_rdap_technical_implementation_guide_1,ICANN,[https://www.icann.org/en/system/files/files/rdap-technical-implementation-guide-21feb24-en.pdf],[ICANN],COMMON
ips,Any,[RFC-ietf-regext-rdap-rir-search-19],[IETF],This extension identifier is used for INR-specific search operations.
ipSearchResults,Any,[RFC-ietf-regext-rdap-rir-search-19],[IETF],This extension identifier is used for INR-specific search operations.
nask,[NASK],[https://www.dns.pl/NASK_extension_of_RDAP_Response],[NASK],COMMON
nro_rdap_profile_0,Any,[https://bitbucket.org/nroecg/nro-rdap-profile/raw/v1/nro-rdap-profile.txt],[NRO],ADDRESS REGISTRIES
nro_rdap_profile_asn_flat_0,Any,[https://bitbucket.org/nroecg/nro-rdap-profile/raw/v1/nro-rdap-profile.txt],[NRO],ADDRESS REGISTRIES
nro_rdap_profile_asn_hierarchical_0,Any,[https://bitbucket.org/nroecg/nro-rdap-profile/raw/v1/nro-rdap-profile.txt],[NRO],ADDRESS REGISTRIES
paging,Any,[RFC8977],[IETF],"This extension describes a best practice for result
      set paging."
platformNS,Any,[https://gitlab.centralnic.com/centralnic/centralnic-rdap-extensions/blob/master/platformNS.md],[CentralNic_Ltd],COMMON
rdap_objectTag,Any,[RFC8521],[IETF],"This extension describes a best practice for
        structuring entity identifiers to enable query bootstrapping."
redacted,Any,[RFC9537],[IETF],This extension identifies the redacted fields in an RDAP response.
redirect_with_content,Any,[https://raw.githubusercontent.com/APNIC-net/rdap-redirect-with-content/v1/apnic-rdap-redirect-with-content.txt],[Tom_Harrison],COMMON
regType,Any,[https://gitlab.centralnic.com/centralnic/centralnic-rdap-extensions/blob/master/regtype.md],[CentralNic_Ltd],COMMON
reverse_search,Any,[RFC9536],[IETF],This extension identifier is used for both URI path segments and response extensions related to the reverse search in RDAP.
rirSearch1,Any,[RFC-ietf-regext-rdap-rir-search-19],[IETF],This extension identifier is used for INR-specific search operations.
sorting,Any,[RFC8977],[IETF],"This extension describes a best practice for result
      set sorting."
subsetting,Any,[RFC8982],[IETF],"This extension describes best practice for partial
      response provisioning."