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This lookup uses the North American NPA NXX Wire Center Edition Database and supplemental data to find the Wire Center, Rate Center, locality, LATA, carrier, and other details associated with any United States or Canadian NPA NXX combination. This lookup is used to find the geographic location, rate center, wire center, and carrier information ...
Oct 30, 2023 · NXX, also known as the Central Office Code or Exchange, is a three-digit code that forms the second part of a 10-digit phone number. For example: In the phone number 555-101-1234, the NXX is 101. Article is closed for comments. NPA and NXX are standard industry terms that you may hear thrown around a lot when ordering or porting phone numbers.
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- North American Numbering Plan
- Lerg
- Maps
- Special Use NPA
- Potentially Premium Rate Npas
- Toll-Free Special Use Npas
- Carrier Identification Codes
- See Also
The North American Numbering Plan (NANP) governs the management of telephone numbers for the Public Switched Telephone Networks in North America (Canada, USA, Carribean, and territories) within the international country code prefix ‘+1’. North American phone numbers are in the format (where N is any digit from 2-9, and X from 0-9): NPA-NXX-XXXX Spe...
The North American numbering plan is available in a data base called the LERG maintained by Telcordia. The LERG has data for every switch and central office in the North American telephone network. Copies of the LERG can be purchased from Telcordia. LERG info is constantly changing, so most users subscribe to periodic updates. Subsets of the inform...
Maps are available that show Central Office locations, local calling areas, and other information Mapquest will generate a map show the approximate Central Office location if you invoke it with a URL like this: http://www.mapquest.com/maps/map.adp?areacode=702&exchange=939 change the area code and exchange values to match the NPA-NXX you want to di...
900-NXX-XXXX–premium rate numbers, prices vary700-NXX-XXXX–defined by long distance carrier, one generally calls 1-700-555-4141 toll-free to identify the carrier500-NXX-XXXX–personal communication services (follow me)533-NXX-XXXX–was reserved for expansion of personal communication services, but the reservation has been withdrawn800-NXX-XXXX888-NXX-XXXX877-NXX-XXXX866-NXX-XXXXAlso known as CIC codes, PIC codes, Dial-Around Numbers, 1010 Numbers, 101XXXX Codes, etc. 1. See Carrier Identification Codes
Feb 28, 2024 · The first three digits of a local seven-digit telephone number. Assigned to a specific switch in a central office. Together, the NPA-NXX denotes the original carrier and central office switch assigned to a particular number. Historically, NPA-NXX combinations provided a reliable way to determine the carrier and approximate location of a number.
NXX often denoted NPA: Numbering plan area code The first NXX block is the numbering plan area code. When the second and third digits are the same, the code is an easily recognizable code (ERC). ERCs designate special services; e.g., 800 for toll-free service. The NANP is not assigning area codes with 9 as the second digit.
- 1
- 011
- +1 NXX NXX-XXXX
NPA: Stands for Numbering Plan Area and is more commonly known as an area code. It’s the first three digits of a phone number, designating a geographic region. NXX: Stands for Central Office Prefix or Exchange code. This is the second set of three digits within a phone number, representing a specific telephone exchange within an area code.
Thus, NXX is a number from 200 through 999, while XXXX is a range from 0000 through 9999. The first three digits of a telephone number are the numbering plan area code (NPA code, or simply NPA). The next three, NXX, identify the central office and the last four digits are the line number of an individual office.
