Which of the following is a prefix that represents a line's central office prefix?
A) NPA
B) NXX
C) MDF
D) SAI

Question

Quizplus · Accepted Answer

The NXX, also known as the central office code or exchange code, is part of the North American Numbering Plan (NANP) telephone numbering plan. It is the second set of three digits in a 10-digit phone number, following the area code (NPA). This prefix helps identify the specific central office from which the telephone service is provided.

Which of the Following Is a Prefix That Represents a Line's