Caller ID for
Area code 670
Area code 670 Northern Mariana Islands
Area code 670 is in Northern Mariana Islands. It’s 4:04 PM there now.
- State
- Northern Mariana IslandsThe only area code in Northern Mariana Islands
- Time zone
- Chamorro4:04 PM there now
- Exchanges
- 35
- Overlay
- NoneThe only code for its area
- No sign-up
- We never contact the number
- Spam risk included
Looking up the caller ID…
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Where area code 670 is
Phone companies in 670
35 blocks of numbers in 670 are held by 3 phone companies. The most belong to Micronesian Telecommunications (15), PTI Pacifica (15) and Guam Wireless Telephone (5).
A large share, about 86%, belongs to competitive and internet phone carriers; wireless networks hold 14% and local phone and cable companies 0%.
A block’s holder is the company it was first assigned to; numbers can move to other carriers since.
History and overlays
670 went into service in 1997.
No new exchanges have been assigned since 2021; the latest was in April 2018.
Calling 670
It’s 4:04 PM Chamorro time in 670 right now.
From elsewhere in the U.S., dial 1, 670 and the 7-digit number.
Nearby area codes
670 is Northern Mariana Islands’s only area code.
From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.
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Questions about 670
Where is area code 670?
In Northern Mariana Islands.
What time zone is 670 in?
Chamorro time. It was 4:04 PM there when this page loaded.
Is 670 an overlay?
No. 670 is the only area code for its area right now.
Which phone companies have 670 numbers?
3 companies hold blocks; the most belong to Micronesian Telecommunications, PTI Pacifica and Guam Wireless Telephone. About 14% of blocks are wireless.
Is 670 running out of numbers?
Not on record, and no new exchanges have been needed since 2021.