I do have a server with kamailio running on carrireroute, recently the need to rewrite prefixes arose, so I did enter the rewrite prefix into the relevant rows/columns in carrierroute tdb table and did reload but nothing changed. The call is matched to it's needed destination but the prefix is the same.

In my config I do have the following line

if(!cr_route("default", "ata.nymgo.com", "$rU", "$rU", "call_id")){

Regards