Value,Description,Reference,Change Controller
0,Reserved,[RFC5492],IETF
1,Multiprotocol Extensions for BGP-4,[RFC2858],IETF
2,Route Refresh Capability for BGP-4,[RFC2918],IETF
3,Outbound Route Filtering Capability,[RFC5291],IETF
4,Multiple routes to a destination capability (deprecated),[RFC8277],IETF
5,Extended Next Hop Encoding,[RFC8950],IETF
6,BGP Extended Message,[RFC8654],IETF
7,BGPsec Capability,[RFC8205],IETF
8,Multiple Labels Capability,[RFC8277],IETF
9,BGP Role,[RFC9234],IETF
10-63,Unassigned,,
64,Graceful Restart Capability,[RFC4724],IETF
65,Support for 4-octet AS number capability,[RFC6793],IETF
66,Deprecated (2003-03-06),,IETF
67,Support for Dynamic Capability (capability specific),[draft-ietf-idr-dynamic-cap-13],IETF
68,Multisession BGP Capability,[draft-ietf-idr-bgp-multisession-03],IETF
69,ADD-PATH Capability,[RFC7911],IETF
70,Enhanced Route Refresh Capability,[RFC7313],IETF
71,Long-Lived Graceful Restart (LLGR) Capability,[RFC-ietf-idr-long-lived-gr-06],IETF
72,Routing Policy Distribution,[draft-ietf-idr-rpd-04],IETF
73,FQDN Capability,[draft-walton-bgp-hostname-capability-01],IETF
74,BFD Strict-Mode Capability,[draft-ietf-idr-bgp-bfd-strict-mode-13],IETF
75,Software Version Capability,[draft-abraitis-bgp-version-capability-11],IETF
76,PATHS-LIMIT Capability,[draft-abraitis-idr-addpath-paths-limit-00],IETF
77,Link-Local Next Hop Capability,[draft-white-linklocal-capability-04],IETF
78,"Edge Metadata Capability (TEMPORARY - registered 2025-05-06, expires 2026-05-06)",[draft-ietf-idr-5g-edge-service-metadata-29],IETF
79-127,Unassigned,,
128,Prestandard Route Refresh (deprecated),[RFC8810],IETF
129,"Prestandard Outbound Route Filtering (deprecated), prestandard Routing Policy Distribution (deprecated)",[RFC8810],IETF
130,Prestandard Outbound Route Filtering (deprecated),[RFC8810],IETF
131,Prestandard Multisession (deprecated),[RFC8810],IETF
132-183,Unassigned,,
184,Prestandard FQDN (deprecated),[RFC8810],IETF
185,Prestandard OPERATIONAL message (deprecated),[RFC8810],IETF
186-238,Unassigned,,
239-254,Reserved for Experimental Use,[RFC8810],IETF
255,Reserved,[RFC8810],IETF