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NPA-NXX The first six digits of a NANP telephone number (or of an LRN). NPA-NXX-X The NPA-NXX-X represents a pooled thousand block drawn from the NPA-NXX. NRUF Numbering Resource Utilization Forecast. NXX term used typically to represent the 4th–6th digits of the ten-digit telephone number (N = any digit 2–9, X = any digit 0–9).
Local Calling Areas. Enter a 10-digit United States or Canadian telephone number to identify its basic local calling area. This lookup uses the Local Calling Areas Database supplemented with the North American NPA NXX Rate Center Edition Database to visually display the basic local calling area for any United States or Canadian area code prefix ...
Over the next 43 years, only 36 area codes were added. In the 1990s, the growth in wireless services drove the addition of 109 new area codes so new blocks of 10,000 numbers could be issued to carriers. These number blocks refer to the first six digits of a telephone number, or NPA-NXX where NPA is the area code and NXX is the switch code.
NPA. CHAR (3) Numbering Plan Area code, the first three digits of a 10 digit North American Numbering Plan (NANP) number, commonly called the Area Code. NXX. CHAR (3) Central Office Code, the first three digits following the Area Code in a 10 digit NANP number, commonly called the telephone exchange or prefix. BLOCK_ID.
Dec 28, 2020 · NANP phone numbers are assigned the country code (1) by the International Telecommunications Union ( ITU ). NANP numbers are ten-digits long. This includes a three-digit Numbering Plan Area (NPA) code — an area code followed by a seven-digit local number or subscriber number. The format is usually represented as: +1 NXX-NXX-XXXX.
NPA (Area) Codes. The area served by the NANP is divided into smaller Numbering Plan Areas (NPAs), each identified by a three-digit NPA code, commonly called an area code. For quick information about a specific area code, use the area code search. You can also find the area code for a city or town with population greater than 20,000.
View current 5XX-NXX assignments. Request a 5XX-NXX assignment. Historical Summary: The 500 NPA code was initially assigned for use with personal communications service, and the INC subsequently designated the 533, 544, 566, 577, 588 and 522 NPA codes for future personal communications service and other non-geographic services. With the ...
