I am pretty new at this. Can you tell me how I can get a list of all of the NPA's already in the PBX or if a certain one is already in there or needs to be added?
sometimes NPAs are programmed as SPNs or even NXXs so you really need to look at those too just to make sure that if you still use seven-digit dialing your NXXs are actually exchanges as opposed to area codes and also your SPNs could contain area codes that may have been altered in some way. just to be on the safe side you may want to check these too.
to get a list of all the present and future NPA's in North America. Print out the NPA list and check to see if they exist in your switch. I do this to keep up with the latest additions. Sometimes the new ones don't get posted until just before they become effective.
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