Patent ID: 8391833

Claim:
A method for providing number portability correction for DIAMETER signaling involving a subscriber of a communications network, the method comprising: at a DIAMETER routing agent: receiving a DIAMETER signaling message from a network node providing a network service to the subscriber and directed to an Online Charging System (OCS), wherein the DIAMETER signaling message includes a called party identifier; accessing a number portability database to determine whether the called party identifier has been ported; in response to determining that the called party identifier has been ported, modifying the DIAMETER signaling message to include results from or derived from the access to the number portability database, wherein modifying the DIAMETER signaling message to include results from or derived from the access to the number portability database includes translating a routing number obtained in the access to the number portability database into a destination realm identifier and inserting the destination realm identifier in the DIAMETER signaling message; and routing the modified DIAMETER signaling message to the OCS.