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1. www.telecomdb.com › npa-nxx-look-upNPA NXX Lookup Tool | NPA NXX Database

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   Search by NPA and NXX, State and City or by LATA. Select from several options below. KFR's free NPA-NXX lookup is great for checking which area codes and prefixes are assigned to a given rate center, what rate center a particular NPA-NXX is in or what area codes are in a specific state.

2. en.wikipedia.org › wiki › National_conventions_forNational conventions for writing telephone numbers - Wikipedia

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   NPA has the same syntax of NXX since the implementation of interchangeable area codes in 1995. The prefix NXX of the subscriber number is the central office code , unique in the numbering plan area. The place holder N stands for the digits 2 to 9 , as the subscriber number may not begin with the digits 0 and 1 .

3. People also ask

   What is a NPA NXX lookup?

   • This lookup is used to find the geographic location, rate center, wire center, and carrier information for any United States or Canadian NPA NXX combination.

   North American Telephone Exchange Lookup by NPA NXX

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   How accurate is NPA-NXX?

   • Rate Centers: While NPA-NXX historically gave an approximate geographic location, the modern reality of rate centers (geographic areas that dictate call pricing) and the mobility of numbers has made such determinations less accurate. Relying on NPA-NXX to determine the current carrier can lead to inaccuracies.

   Understanding NPA-NXX and the Implications of Number Portability

   trestleiq.com/knowledge-base/understanding-npa-nxx-and-the-implications-of-number-portability/

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   What happens if NPA-NXX data is missing?

   • Missed Fraud Detection: Criminals can exploit outdated NPA-NXX data by using ported numbers or VoIP services to mask their actual location or identity, potentially leading to increased fraudulent activities.

   Understanding NPA-NXX and the Implications of Number Portability

   trestleiq.com/knowledge-base/understanding-npa-nxx-and-the-implications-of-number-portability/

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   Why should I buy NPA-NXX data from KFR?

   • When you buy NPA-NXX data from KFR, you'll experience many benefits and conveniences beyond what you can get with our free lookup tool. You can: Access new NXXs up to 90 days before effective dates. View NXXs 60 days after removal. Guarantee data accuracy through extensive cross-checking and verification.

   NPA NXX Lookup Tool | NPA NXX Database

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4. www.npanxxsource.com › nalenndNorth American Telephone Exchange Lookup by NPA NXX

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   Central Office Details From NPA NXX. 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 ...

5. www.voip-info.org › npa-nxxThe North American Numbering Plan (NANP) - VoIP-Info

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   Jul 14, 2005 · North American phone numbers are in the format (where N is any digit from 2-9, and X from 0-9): NPA-NXX-XXXX. Specifically: NPA identifies the 3-digit Numbering Plan Area (Area Code) NXX identifies the Central Office (aka. Exchange) within the NPA.

6. www.nationalnanpa.com › number_resource_info › coNANPA : Numbering Resources - Central Office Codes

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   A Central Office (CO) code or NXX code refers to the second three digits (also called digits D-E-F) of a ten-digit telephone number in the form of NPA-NXX-XXXX, where N represents any one of the numbers 2 through 9 and X represents any one of the numbers 0 through 9. CO codes are also known as an exchange, or prefix, or an NXX.

7. en.wikipedia.org › wiki › North_American_Numbering_PlanNorth American Numbering Plan - Wikipedia

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   Although NANP allows businesses within the member country to use the toll-free number system, most toll-free numbers to the United States and Canada remain barred from in the Caribbean unless paid as a toll call.

8. trestleiq.com › knowledge-base › understanding-npaUnderstanding NPA-NXX and the Implications of Number Portability

   trestleiq.com › knowledge-base › understanding-npa

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   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.