The Full form of NXX is identifies the central office exchange allocated within the NPAs, or NXX stands for identifies the central office exchange allocated within the NPAs, or the full name of given abbreviation is identifies the central office exchange allocated within the NPAs.
NXX (identifies the central office exchange allocated within the NPAs)
identifies the central office exchange allocated within the NPAs is known as NXX.
NXX all full forms
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