Area Code 670: Saipan, Northern Mariana Islands
670 is a telephone area code serving Northern Mariana Islands, including Saipan. It is part of the North American Numbering Plan and is dialed with the country code +1.
Numbers beginning with 670 are located in Northern Mariana Islands, United States (NANP region: Territory). The code covers Saipan.
How to Dial Area Code 670
| Calling from | What to dial |
|---|---|
| Anywhere in the US or Canada | 1 670 XXX-XXXX (10-digit dialing: 670 + 7-digit number) |
| Local call inside the same area code | 7-digit number in most areas; 10 digits where an overlay code is active |
| From the UK or Europe | 00 1 670 XXX XXXX |
| From Australia | 0011 1 670 XXX XXXX |
| From a mobile phone anywhere | +1 670 XXX XXXX |
Whatever country you are calling from, the + symbol replaces the exit code. Save the contact as +1 670 XXXXXXX and it will dial correctly from any phone in the world.
Time Zone for Area Code 670
Calls to a 670 number ring in the Pacific/Saipan time zone, standard offset UTC+10:00. This zone does not observe daylight saving time, so the offset above holds all year.
Note: the Northern Mariana Islands do not observe daylight saving time.
Cities and Communities Served by 670
The following places fall inside the 670 calling area:
Other Area Codes in Northern Mariana Islands
These codes also serve Northern Mariana Islands. Area codes are assigned by the North American Numbering Plan Administration (NANPA).
| Area Code | Cities / Coverage |
|---|
See all 1 area codes in Northern Mariana Islands →
Frequently Asked Questions
Where is area code 670?
Area code 670 is in Northern Mariana Islands, United States. It covers Saipan.
What time zone is area code 670 in?
Area code 670 rings in the Pacific/Saipan time zone (UTC+10:00 standard).
Do I need to dial 1 before area code 670?
Yes, for a long-distance call inside the US and Canada you dial 1 first, then 670, then the seven-digit number. The 1 is the North American long-distance trunk prefix — it is not the country code. From outside North America you dial your exit code then 1 then 670.
Is area code 670 toll-free?
No. 670 is a standard geographic area code, so normal long-distance rates apply unless your plan includes them. Toll-free NANP codes are 800, 833, 844, 855, 866, 877 and 888.