Patent ID: 8599866

Claim:
A system, comprising: a local number portability database; and a second mobile switching center of a second technology system in communication with the local number portability database, the second mobile switching center performing functions including receiving, via an inter-machine trunk, a call from a first mobile switching center of a first technology system upon the first mobile switching center receiving a local routing number of the second mobile switching center from the local number portability database, the inter-machine trunk including data translation for translating data back and forth between the first mobile switching center and the second mobile switching center, the call being intended for a mobile directory number of a destination phone that has been intra-service ported from the first technology system to the second technology system, wherein the first mobile switching center and the second mobile switching center reside within a mobile service carrier's own system; and wherein prior to receiving the location routing number from the local number portability database, the first mobile switching center queries a home location register of the first technology system and receives a negative return result, the negative return result including at least one of a mismatch or an unassigned directory number.