DNPA/NXX - Desired NPA NPA refers to the Numbering Plan Area, or the area code for a geographic region. NXX NXX is a generic name, in which N refers to a number between 2 and 9, and X to a number from 0 through 9. NXX represents the Central Office Code of a telephone number in North America. and NXX

Identifies the serving area of the tandem office or end office for the trunking service being provided.

USAGE: This field is conditional.

NOTE 1: Optional when the first position of the REQTYP field on the ASR Access Service Request Form is “M” and the ACT field on the ASR Form is “N” or “C”, otherwise prohibited.

DATA CHARACTERISTICS: 6 numeric characters

EXAMPLE: 2 0 1 9 8 1