[OpenSER-Users] The best way to allow just a few destinations based on prefix?

Hi, which would be the more ellegant way to allow users to call just a few destinations (based on prefix)? Of course I could do it simply by creating a custom table: "allowed_destinations" with columns: [int_prefix] [description] 34 Spain 44 England ... and latter extract the international prefix from the E164 converted RURI and do a SQL query. But I'd like to avoid using avp_db_query() function. I've reading about PDT, LCR and CarrierRoute modules but they seems to be supposed to other aims. The most similar could be PDT but it needs to strip my prefix XD What do you suggest? should I implement my custom method for this? Thanks. -- Iñaki Baz Castillo ibc(a)in.ilimit.es