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Centrus NPA Boundaries data is based
on the Numbering Plan Areas (Area Code) boundaries from MapInfo. This database
is designed to allow users to identify the geographical areas of every NPA in
use for end office destination codes on the public switched telecommunications
network. There is significant change taking place in NPA boundary geography due
to the increasing need for NPA relief. The NPA product reflects current and
accurate boundary changes both where new NPAs split from existing NPAs and
where new NPAs overlay existing NPAs within which a local telephone company may
offer local or long distance service. There are currently 277 Numbering Plan
Areas in the US.
Centrus
NPA Boundary data is designed for use with Centrus
Spatial+
solutions.
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