North American Numbering Plan
North American Numbering Plan (NANP). The North American Numbering Plan is the basic numbering scheme for the telecommunications networks located in American Samoa, Anguilla, Antigua, Bahamas, Barbados, Bermuda, British Virgin Islands, Canada, Cayman Islands, Dominica, Dominican Republic, Grenada, Jamaica, Montserrat, Sint Maarten, St. Kitts & Nevis, St. Lucia, St. Vincent, Turks & Caicos Islands, Trinidad & Tobago, and the United States (including Puerto Rico, the U.S. Virgin Islands, Guam, the Commonwealth of the Northern Mariana Islands).
47 CFR § 52.5
Incumbent local exchange carrier. With respect to an area, an incumbent local exchange carrier is a local exchange carrier that:
(1) On February 8, 1996, provided telephone exchange service in such area; and
(i) On February 8, 1996, was deemed to be a member of the exchange carrier Association pursuant to § 69.601(b) of this chapter (47 CFR 69.601(b)); or
(ii) Is a person or entity that, on or after February 8, 1996, became a successor or assign of a member described in paragraph (a)(2)(i) of this section.