What does NXX stand for?
What does NXX mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: NXX.
We've found a total of 1 definition for NXX:
North American direct distance dialing numbering plan, 'n' Is Any Number From 2 To 9, and 'x' Is Any Number From 0 To 9