Area code 670

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					Area code 670
From Wikipedia, the free encyclopedia                                                                 Coordinates: 15°11′N 145°45′E

The area code 670 is the local telephone area code for the U.S. Commonwealth of the Northern Mariana Islands (CNMI). It
was created on July 1, 1997 and replaced the previous International Telecommunication Union country code 670, which is
now used by East Timor.

 1 History
 2 Cost of international calls
 3 Dialing
 4 See also
 5 External links

Although the Northern Mariana Islands (NMI) became a commonwealth in 1978 and the United States assumed sovereignty
in 1986, calling between the CNMI and the rest of the United States remained an international call (011-670-XXX-XXXX). As
international calling rates began to fall in the more competitive destination countries during the 1990s, it became a
considerable financial burden for people calling between the U.S. Mainland and the CNMI.
After the CNMI was added to the North American Numbering Plan, the U.S. Federal Communications Commission (FCC)
regulated calls to and from the CNMI as "domestic", hence dramatically lowering the cost of these telephone calls. This
change also opened up national toll-free numbers to callers from the CNMI, which became very popular with the advent of
pre-paid phone cards.
However, since no mobile telephone carriers in the U.S. are present in the CNMI, cellular calls to the CNMI are not
considered "domestic" or within the definition of "nationwide long distance".

Cost of international calls
FCC's regulation of the CNMI as "domestic" has no legal effect for telephone carriers outside the United States, for whom the
CNMI is often not a competitive destination. Therefore, calls from other countries inbound to the CNMI can still be relatively
expensive, especially compared to outbound calls from the CNMI since the CNMI has access to most U.S. toll-free numbers.

Within the islands, only the seven-digit phone number is necessary. When a person in the islands calls anywhere in the
United States or Canada, he or she simply dials 1 and then the area code and phone number. For callers in the U.S. or
Canada calling to the islands, one first dials 1-670, followed by the seven-digit phone number.

See also
   North American Numbering Plan

External links
   List of exchanges from, 670 Area Code
                                              Northern Mariana Islands area codes: 670
                                                           North: Pacific Ocean
                        West: Pacific Ocean                  area code 670               East: Pacific Ocean, 808
                                                               South: 671
                                                               Hawaii area codes: 808
                                                                Guam area codes: 671

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