NXX definition

NXX means the three-digit code, which appears as the first three digits of a seven-digit telephone number within a valid NPA or area code.
NXX means the three-digit code that appears as the first three digits of a seven-digit telephone number within a valid area code (i.e., an NXX other than a special 500, 600, 700, 800 or 900 code).
NXX means the three-digit code which appears as the first three digits of a seven-digit telephone number.

Examples of NXX in a sentence

Only those valid NXX codes served by an End Office may be accessed through a direct connection to that End Office.

Timing of such delivery and determination of which Telephone Directories shall be delivered (by customer address, NPA NXX or other criteria) and the number of Telephone Directories to be provided per customer, shall be provided under the same terms that CBT delivers Telephone Directories to its own local service customers.


More Definitions of NXX

NXX means the fourth, fifth and sixth digits of a ten-digit telephone number.
NXX means a three-digit code valid within an area code (i.e., numbering plan area or “NPA”) which appears as the first three digits of a seven digit telephone number with the exception of the special 500, 600, 700, 800, and 900 codes and other similar special codes which may come into common usage in the future.
NXX or “Central Office Code” means the three (3)-digit switch entity indicator that is defined by the fourth (4th) through sixth (6th) digits of a ten (10)-digit telephone number within the NANP. Each NXX Code contains ten thousand (10,000) station numbers.
NXX means the fourth, fifth and sixth digits of a ten-digit telephone number, and designates a Central Office Code
NXX means the three-digit switch entity indicator that is defined by the “D”, “E”, and “F” digits of a 10-digit telephone number within the NANP. Each NXX contains 10,000 station numbers.
NXX means the three digit code which appears as the first three digits of a seven digit telephone number.
NXX or “NXX Code” means the three-digit switch entity indicator (i.e. the first three digits of a seven-digit telephone number).