BGP communities are a method to group a set of prefixes and apply some attributes, such as local preference, or route filtering, to all the members of that group. This grouping is done through assigning a "community" value to an IP prefix.

For example, a network administrator can create a community with the value 65000:100 and assign it to all the prefixes that belong to a specific customer. The routers in the network can then be configured to give a higher local preference to all prefixes that have that community value, ensuring that traffic for that customer will always be preferred over other customers.

A common use of BGP communities is to control the distribution of routes between different ASNs. For example, a network operator may use communities to ensure that only certain prefixes are exported to specific customers or peers.

This page lists known meanings of BGP communities for AS20473

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Quick Search:

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Full Listing:

	Community	Description
	20473:100	Prefix learned from Transit
	20473:200	Prefix learned from Public Peer
	20473:300	Prefix learned from Private Peer
	20473:400	Prefix originated by Customer
	20473:4000	Prefix originated by Customer
	20473:500	Prefix originated by 20473
	20473:nnn	Prefix learned from AS$0
	20473:100:nnn	Prefix learned from Transit AS$0
	20473:200:nnn	Prefix learned from Public Peer AS$0
	20473:300:nnn	Prefix learned from Private Peer AS$0
	20473:13	United States - Chicago, IL
	20473:14	United States - Atlanta, GA
	20473:15	United States - Dallas, TX
	20473:16	United States - Seattle, WA
	20473:17	United States - Los Angeles, CA
	20473:18	United States - San Jose, CA
	20473:19	Europe - London, GB
	20473:20	Europe - Amsterdam, NL
	20473:21	Europe - Paris, FR
	20473:22	Europe - Frankfurt, DE
	20473:23	Asia & Pacific - Tokyo, JP
	20473:24	Asia & Pacific - Sydney, AU
	20473:25	Asia & Pacific - Singapore, SG
	20473:26	Asia & Pacific - Korea, KR
	20473:27	Europe - Stockholm, SE
	20473:28	Americas - Mexico, MX
	20473:29	Europe - Warsaw, PL
	20473:30	Americas - Sao Paulo, BR
	20473:31	Europe - Madrid, ES
	20473:32	Asia & Pacific - Melbourne, AU
	20473:33	Americas - Toronto, CA
	20473:34	United States - Honolulu, HI
	20473:35	Asia & Pacific - Mumbai, IN
	20473:43	Asia & Pacific - Bangalore, IN
	20473:44	Asia & Pacific - New Delhi, IN.
	20473:6000:nnn	Do not announce to AS$0
	20473:6001:nnn	Prepend 1x to AS$0
	20473:6002:nnn	Prepend 2x to AS$0
	20473:6003:nnn	Prepend 3x to AS$0
	20473:6009:nnn	Set metric to 0 for AS$0
	20473:6099:nnn	Force announce to AS$0
	20473:6601	Do not announce to IXP peers
	20473:6602	Announce to IXP route servers only
	20473:6000	Do not announce to any peer
	20473:64609	Set Metric to 0 to all AS’s
	20473:6001	Prepend 1x to all AS’s
	20473:6002	Prepend 2x to all AS’s
	20473:6003	Prepend 3x to all AS’s
	20473:666	Export blackhole to all AS’s

Some of this data was sourced from the lg.ring.nlnog.net project 
Copyright (c) 2022 Stichting NLNOG 

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