AS207530 uses BGP Large Communities (RFC 8092) exclusively, in the format (207530, function, parameter) or 207530:function:parameter.
Origin & Type (set on import)
Community
Meaning
207530:1:0
Own prefix
207530:1:1
Learned from downstream
207530:1:2
Learned from transit
207530:1:3
Learned from IX / peer
Location (PoP) (set on import)
Community
Location
207530:2:1
Frankfurt (Equinix), DE, EU
207530:2:2
Frankfurt, DE, EU (Digital Reality)
207530:2:3
Amsterdam, NL, EU (Nikhef)
207530:2:4
Dusseldorf, DE, EU (myLoc/WITT DC)
207530:2:5
St. Louis, Mo, USA (Netrality)
207530:2:6
Amsterdam, NL, EU (Quora DC)
Action Communities (may be set by downstreams)
Community
Effect
207530:100:0
Do not announce externally (NO-EXPORT)
207530:101:0
Prepend AS once on external announce
207530:102:0
Prepend AS twice on external announce
207530:103:0
Prepend AS three times on external announce
Notes for downstreams
Set the action communities on your announced prefixes to control routing through AS207530 (prepending or NO-EXPORT).
The origin and location communities (207530:1:x and 207530:2:x) are set by AS207530 itself and should not be sent.
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Frankfurt (Equinix), DE, EU 
Amsterdam, NL, EU (Nikhef)
St. Louis, Mo, USA (Netrality)