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 or “Central Office Code" is the three-digit switch entity indicator that is defined by the fourth through sixth digits of a 10-digit telephone number within the NANP. Each NXX Code contains 10,000 station numbers.
NXX. “NXX Code,” “COC,” “Central Office Code,” or “CO Code” is the three-digit switch entity indicator which is defined by the fourth, fifth and sixth digits of a 10-digit telephone number within NANP.
Examples of NXX in a sentence
A single Central Office may handle several Central Office codes ("NXX").
Portability for an entire NXX shall be provided by utilizing reassignment of the NXX to CLEC through the LERG.
Each Party is responsible for administering NXX codes assigned to it.
When CLEC uses numbers from a CenturyLink NXX, CenturyLink shall provide the same range of number choices to CLEC, including choice of exchange number, as CenturyLink provides its own subscribers.
The NANP format is a 10- digit number that consist of a 3-digit NPA Code (commonly referred to as the area code), followed by a 3-digit NXX code and 4 digit line number.
More Definitions of NXX
NXX means the fourth, fifth and sixth digits of a ten-digit telephone number.
NXX. NXX Code," or "End Office Code" means the three digit switch entity indicator (i.e. the first three digits of a seven digit telephone number).
NXX. “NXX Code”, “Central Office Code”, or “CO Code” is the 3-digit switch indicator that is defined by the D, E, and F digits of a 10-digit telephone number within the North American Numbering Plan. Each NXX Code contains 10,000 telephone numbers.
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 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. NXX Code", "Central Office Code" or "CO Code" . . . . . . . II-7 1.54 "911 Service" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-7 1.55 “Owner” and “Operator” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-7 1.56 "POI" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-7 1.57 "Provider" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-7 1.58 "Public Safety Answering Point" or "PSAP" . . . . . . . . . . . . . . . . . . . II-7 1.59 "Rate Center" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-7 1.60 "Routing Point" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-8 1.61 "Service Control Point" or "SCP" . . . . . . . . . . . . . . . . . . . . . . . . . . . II-8 1.62 "Service Switching Point" or "SSP" . . . . . . . . . . . . . . . . . . . . . . . . . II-8 1.63 "Signaling Point" or "SP" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-8 1.64 "Signaling System 7" or "SS7" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-8 1.65 "Signal Transfer Point" or "STP" . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-8 1.66 "Subsidiary" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-8 1.67 "Synchronous Optical Network" or "SONET" . . . . . . . . . . . . . . . . . II-9 1.68 "Switched Access Service" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-9 1.69 "Telecommunications Services" . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-9 1.70 “Third Party Contamination” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-9 1.71 “Two-Way Wireless Mobile Telecommunications Service Provider” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-9 1.72 “Undefined Terms” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-9 1.73 "Vertical Features" (including "CLASS Features") . . . . . . . . . . . . . II-9 1.74 "Wire Center" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-9 ARTICLE III GENERAL PROVISIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III-1 1. Scope of General Provisions I-1
NXX refers to the first three digits of a telephone number, which identify the specific telephone company central office that serves that number.