A list and explanation of AS286's used communities can be found here (AS286-communities.html). For details on KPN's regional / selective blackhole support see AS286-erBH.html
A general outline of AS286's routing policy can be found here (AS286-routing-policy.html).
AS286's peering policy can be found here (AS286-peering-policy.html).
AS286's filtering policy can be found here (AS286-filtering-policy.html).
Other useful links and notes