What is my central office code?
A central office code is the group of three digits (NXX) in the ten-digit NANP area address, NPA-NXX-XXXX i.e. a national telephone number, that follows the three-digit area code (NPA). It is the leading component of the seven-digit local telephone number.
How many central offices are in the United States?
25,000 central offices
There are more than 25,000 central offices in the U.S. See LEC, IXC and LATA.
What is a switch Clli code?
CLLI code (sometimes referred to as CLLI name or COMMON LANGUAGE Location Identifier Code, and often pronounced as silly) is a Common Language Information Services identifier used within the North American telecommunications industry to specify the location and function of telecommunications equipment or of a relevant …
What are the parts of a phone number?
Phone numbers in the United States typically consist of 11 digits — the 1-digit country code, a 3-digit area code and a 7-digit telephone number. The 7-digit telephone number is further comprised of a 3-digit central office or exchange code and a 4-digit subscriber number. The country code of USA is +1.
Who is central office?
In telephone communication in the United States, a central office (CO) is an office in a locality to which subscriber home and business lines are connected on what is called a local loop. The central office has switching equipment that can switch calls locally or to long-distance carrier phone offices.
What is a central office meaning?
A central office, in telecommunications, is a building to which subscriber home and business lines are connected on a local loop. This office has telephone switches to switch calls locally or to a long-distance carrier office. This term is also known as end office or public exchange.
What is a device Clli?
CLLI (pronounced “silly”) is a Bell System acronym standing for Common Language Location Identifier. It was a standardized way of describing locations and significant pieces of hardware at those locations.
What is a Clei code?
The CLEI code is a globally unique, ten-character alphanumeric intelligent code assigned by Telcordia Technologies at the request of equipment suppliers. The CLEI code identifies communications equipment by specifying product type and features.
What are 6 digit phone numbers?
A six-digit phone number is what’s known as a short code. Many businesses use short codes to send out marketing blasts or alerts. Short codes are also useful for anyone who’s set up two-step verification to log into their accounts on sites like Google or Twitter.
What is central office connection?
A telephone exchange, telephone switch, or central office is a telecommunications system used in the public switched telephone network (PSTN) or in large enterprises. It interconnects telephone subscriber lines or virtual circuits of digital systems to establish telephone calls between subscribers.
How does a central office work?
What is a central office code?
Central office codes, also known as exchanges, prefixes, or simply NXXs, are digits 4, 5 and 6 of a ten-digit geographic NANP telephone number. NANPA assigns central office codes to state-authorized local service providers using industry-developed guidelines and federal directives.
Who assigns central office codes to local service providers?
NANPA assigns central office codes to state-authorized local service providers using industry-developed guidelines and federal directives. Because the application and qualification process is complex, potential applicants should read and understand the guidelines.
How do I apply for a central office code assignment?
Because the application and qualification process is complex, potential applicants should read and understand the guidelines. To apply for a central office code assignment, log into the NANP Administration System and complete the Part 1 form. NANPA has prepared a job aid to assist applicants for central office code assignments.
How do I expedite a central office code?
The process of getting a newly assigned central office code in service is lengthy; but, under certain circumstances described in the guidelines, the interval can be shortened. This is commonly referred to as a code expedite. This can be done only with the concurrence of the interconnecting tandem owner.