To call Mariana Islands from the U.S. Click to find Mariana Islands prepaid phone cards.
Dial 011 + 670 + City Code + Phone Number
Mariana Islands City Codes
|City Name||City Code|
|This country does not utilize City Codes|
Under US administration as part of the UN Trust Territory of the Pacific, the people of the Northern Mariana Islands decided in the 1970s not to seek independence but instead to forge closer links with the US. Negotiations for territorial status began in 1972. A covenant to establish a commonwealth in political union with the US was approved in 1975. A new government and constitution went into effect in 1978.
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