Methods and systems for providing universal triggerless number portability

A method for use in a universal triggerless number portability (TNP) routing node for processing call signaling messages associated with ported subscribers, the method comprising:

• (a) receiving a first call setup message including a dialed number;
• (b) determining whether a first routing number (RN) is contained in the first call setup message, and in response to determining that the first routing number is contained within the first call setup message, determining whether the first RN is a home RN;
• (c) in response to determining that the first RN is a home RN, performing a lookup in a number portability (NP) database based on the dialed number;
• (d) extracting, from the number portability database, a second RN for a signaling point identified by the dialed number;
• (e) modifying the first call setup message to include the second routing number in lieu of the first routing number;
• and
• (f) routing the first call setup message to the signaling point.

A method for number portability processing, the method comprising:

• (a) receiving a call setup message including a dialed number and routing number for a tandem gateway in a called party address field of the first call setup message;
• (b) determining whether number portability processing is required for the call setup message;
• (c) in response to determining that number portability processing is required for the call setup message, performing a lookup in a number portability database based on the dialed number and returning a second routing number corresponding to an end office or mobile switching center (MSC);
• (d) modifying the call setup message to include the routing number of the end office or MSC;
• and
• (e) routing the call setup message to the tandem gateway.