The preferred embodiments described herein provide a method for NPA split
processing on a service control point. These preferred embodiments can be
used to overcome problems encountered during a permissive dialing period
of an NPA split and yield several advantages over prior art approaches to
this problem. Specifically, these preferred embodiments do not require
changes to be made to an existing call processing record to include a
pointer to a new call processing record identified by a telephone number
with a new NPA. Additionally, unlike prior approaches that require
changes to be made to all incoming query messages to a service control
point, these preferred embodiments do not require extra processing for
services that are not NPA sensitive.