- Telephone exchange - Wikipedia, the free encyclopedia
In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls. A central office is ...
- North American Numbering Plan - Wikipedia, the free encyclopedia
10-digit dialing: NPA Nxx xxxx; 11-digit dialing: 1 NPA Nxx xxxx; The overlap between area codes and exchange prefixes has occasionally produced some confusion because the ...
- NPA NXX Area Code Database List Directory with Exchanges
NPA NXX Area Code Database List & demographics, Directory of Area Codes NPA NXX, Exchanges, CLLi, Lat/Lon, Carrier, Landline/Cell indicator.
- North American Numbering Plan NPA NXX databases
North American Numbering Plan NPA NXX databases. Complete coverage of all active North American telephone area code and central office local exchange prefix assignments.
- NXX - What does NXX stand for? Acronyms and abbreviations by the ...
Acronym Definition; NXX: Network Numbering Exchange (in North American Numbering Plan)
- NALENND Online - NPA NXX Lookup
NALENND Online, the npa nxx lookup utility. Online version of NALENND, the North American Local Exchange NPA NXX Database, providing complete coverage of the North ...
- NXX definition (Phone Scoop)
NXX (Exchange) 1. NXX is most commonly used to refer to three-digit code that forms the second part of a 10-digit North American phone number (digits 4-6).
- NPA.NXX - Bandipedia - Business VoIP, Internet Access and Hosted ...
What is it? The term NPA.NXX refers to the first six digits of a phone number, or prefix, as derived from the North American Number Plan (NANP).
- NPA NXX Home Page - Welcome to puck.nether.net
You can enter the Area Code and prefix (first three digits of telephone number) and we will attempt to display where it's located. You can use the percent sign (%) as ...
- Local calling guide: NPA-NXX search
Search by area code/prefix (NPA/NXX) or OCN. NPA: NXX: Block: OCN: Region: LATA: Switch: Effective date within past or next days. Effective date searches are ...