# Area code 664 > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Area_code_664 > Markdown URL: https://mediated.wiki/source/Area_code_664.md > Source: https://en.wikipedia.org/wiki/Area_code_664 > Source revision: 1314557967 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) NANP area code for Montserrat **Area code 664** is a telephone [area code](/source/NPA_code) in the [North American Numbering Plan](/source/North_American_Numbering_Plan) (NANP) for [Montserrat](/source/Montserrat), a British Overseas Territory in the [Caribbean](/source/Caribbean). The digits of the area code translate to *MNI* in the alphanumeric mapping on telephone dials. The area code was created in a split of [area code 809](/source/Area_code_809),[1] which had been assigned in the 1960s to all of the Caribbean islands. All existing central office codes and telephone numbers were carried from area code 809 to 664, as established. A permissive dialing period was conducted from 1 July 1996 to 1 June 1997 during which use of either area code was permitted for calls into the country terminating in previously established central offices. Destinations with newly issued central office codes required the new area code.[1] A local call within Montserrat is dialed with seven digits. A call from another North American Numbering Plan country (such as the [United States](/source/United_States) or [Canada](/source/Canada)) requires dialing the long-distance access code (*1*), the NPA code, and the seven-digit [telephone number](/source/Telephone_number). At one time the small island of Montserrat used only four-digit [telephone numbers](/source/Telephone_numbers) internally, as the first three digits after the former 809 area code were the same for everyone (491). As of May 2011, Montserrat has seven-digit numbers beginning with 236, 349, 410, 411, 412, 413, 415, 491, 492, 493, 494, 495, 496, 664, and 724. ## See also - [Area codes in the Caribbean](/source/Area_codes_in_the_Caribbean) - [List of North American Numbering Plan area codes](/source/List_of_North_American_Numbering_Plan_area_codes) ## References 1. ^ [***a***](#cite_ref-IL96_1-0) [***b***](#cite_ref-IL96_1-1) ["Information Letter 96/04-010: NANP-Introduction of new 664 (Montserrat) Numbering Plan Area (NPA)"](https://www.nanpa.com/sites/default/files/planning_letters/IL-96-04-010.pdf) (PDF). [NANPA](/source/NANPA)/Bellcore. 1996-04-22. Retrieved 2025-05-07. Montserrat area codes: 664 North: 268, 869 West: Caribbean Sea 664 East: 268 South: Country code 590 in Guadeloupe Saint Kitts and Nevis area codes: 869 Antigua and Barbuda area codes: 268 v t e Lists of area codes in the North American Numbering Plan United States Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah U.S. Government Vermont Virginia Washington West Virginia Wisconsin Wyoming American Samoa Guam Northern Marianas Puerto Rico U.S. Virgin Islands Other Canada Caribbean Former Belize Costa Rica Cuba El Salvador Guatemala Haiti Honduras Mexico Nicaragua Panama v t e Telephone numbers in North America Sovereign states Antigua and Barbuda Bahamas Barbados Belize Canada Costa Rica Cuba Dominica Dominican Republic El Salvador Grenada Guatemala Haiti Honduras Jamaica Mexico Nicaragua Panama Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines Trinidad and Tobago United States Dependencies and other territories Anguilla Aruba Bermuda Bonaire British Virgin Islands Cayman Islands Curaçao Greenland Guadeloupe Martinique Montserrat Puerto Rico Saint Barthélemy Saint Martin Saint Pierre and Miquelon Saba Sint Eustatius Sint Maarten Turks and Caicos Islands United States Virgin Islands [17°36′45″N 62°16′53″W / 17.61250°N 62.28139°W / 17.61250; -62.28139](https://geohack.toolforge.org/geohack.php?pagename=Area_code_664¶ms=17_36_45_N_62_16_53_W_type:adm3rd_region:MS) This Montserrat-related article is a stub. You can help Wikipedia by adding missing information. - [v](https://en.wikipedia.org/wiki/Template:Montserrat-stub) - [t](/source/Template_talk%3AMontserrat-stub) - [e](https://en.wikipedia.org/wiki/Special:EditPage/Template:Montserrat-stub) This article related to a telephone area code is a stub. You can help Wikipedia by adding missing information. - [v](https://en.wikipedia.org/wiki/Template:Areacode-stub) - [t](/source/Template_talk%3AAreacode-stub) - [e](https://en.wikipedia.org/wiki/Special:EditPage/Template:Areacode-stub) --- Adapted from the Wikipedia article [Area code 664](https://en.wikipedia.org/wiki/Area_code_664) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Area_code_664?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.