The phone code 1670 at the beginning of the phone number +1670 (subscriber’s phone) means that you are being called from Northern Mariana Islands or you are calling a subscriber registered in Northern Mariana Islands.
+1670 — Northern Mariana Islands
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Telephone Code +1670 — what country it is
The international phone code +1670 officially belongs to Northern Mariana Islands, so all phone numbers that start with these numbers refer to this country.
It means that you must enter “1670″ after the “+” sign to call to Northern Mariana Islands. Then the next digits of the phone number can be entered.
Whose country code is +1670?
+1670 is the beginning of a phone number which can belong to any subscriber who purchased a SIM card in Northern Mariana Islands. It does not mean that a subscriber is definitely there at the time of the call (since he or she can make a call in roaming), but there is such a possibility.