"SCOPE PURPOSE Prior to the widespread use of the NPA- 211-xxxx and NPA- 511-xxxx formats as non-dialable pseudo- Automatic Number Identification (p-ANI)@ many Eligible Users implemented dialable 10 digit numbers assigned from valid number ranges as p-ANIs. ESIF Issue 46 addressed triggers for Eligible Users to migrate from dialable p-ANIs to non-dialable p-ANIs. Issue 46 also stated that ""Migration of existing dialable p-ANIs to non-dialable p-ANIs should be handled by the Eligible User in partnership and close coordination with the public safety community and E9-1-1 service providers to ensure an efficient and timely use of resources with minimal impact on existing service."" If the migration from dialable p-ANIs is not completed correctly@ 9-1-1 calls may be misrouted and inaccurate location information may be presented to the 9-1-1 call taker. Migration processes and procedures should be documented to assure that all impacted entities are informed of the migration and that all parties understand their responsibilities to assure the complete@ successful migration from dialable p-ANIs to non-dialable p-ANIs. This document defines processes procedures and roles and responsibilities for all entities impacted by the migration of dialable p-ANIs to non-dialable p-ANIs."