Why are Non-local telephone numbers an issue?
Some VoIP service providers have also made telephone numbers available from any location in their footprint. It is therefore possible to have telephone numbers assigned to a device where the number does not match the local wireline telephone number assignments (Example a device in Virginia can have a telephone number from New York). These non-local telephone numbers create anomalies for many of the 9-1-1 system components that were designed around the geographic relevance of the NPA assignment. The current treatment of these numbers is through the use of a pANI or ESQK, and via the same methods as are currently being used for nomadic VoIP service.
