Multiple choice technology

Telephone numbers in the US have the format of:

  1. NPA-Line-NXX

  2. NXX-Line-area code

  3. NPA-NXX-Line/number

  4. NPA-NXX
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

US telephone numbers follow the format NPA-NXX-Line where NPA is the Numbering Plan Area (area code), NXX is the central office code (exchange), and Line is the unique subscriber number. This creates the familiar (XXX) XXX-XXXX format.

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