Area code 664 in a telephone area code in the North American Numbering Plan (NANP) for Montserrat, a British Overseas Territory in the 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, with a permissive dialing period from 1 July 1996 to 1 June 1997.
A local call within Montserrat is dialed with seven digits. A call from another North American Numbering Plan country (such as the United States or Canada) requires dialing the long-distance access code (1), the NPA code, and the seven-digit telephone number.
At one time the small island of Montserrat used only four-digit 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.
| 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 | ||
17°36′45″N62°16′53″W / 17.61250°N 62.28139°W
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The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1. Some North American countries, most notably Mexico, do not participate in the NANP.
The area code 868 is assigned to Trinidad and Tobago, a member of the North American Numbering Plan (NANP). The telephone numbering plan for the country is known as the National Numbering Plan. It is part of a system used for assigning telephone numbers in Trinidad and Tobago, and functions as a part of the North American Numbering Plan (NANP). It is regulated by the Telecommunications Authority of Trinidad and Tobago, which holds responsibility for telecommunications in the country.
Area code 441 is the telephone area code in the North American Numbering Plan (NANP) for Bermuda. The numbering plan area (NPA) was created on 1 October 1995 in a split of area code 809.
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Area code 869 is the local telephone area code of Saint Kitts and Nevis. The 869 area code was created during a split from the original (809) area code which began permissive dialing on 1 October 1996 and ended 31 March 1997.
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Area code 784 is the local telephone area code of Saint Vincent and the Grenadines. The 784 area code, or "SVG" was created during a split from the original 809 area code which began permissive dialing 1 June 1998 and ended 1 June 1999.
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Area code 721 is the telephone area code in the North American Numbering Plan (NANP) for Sint Maarten, a constituent country of the Kingdom of the Netherlands in the Caribbean. The area code was assigned in 2011 after membership of the country in the NANP became effective. International dialing to the country requires the use of country code 1.