Mariana Island flag MP

How to Call Mariana Island from the United States

Country code +1670 — Dial 1 670-XXX-XXXX from a US landline or +1 670-XXX-XXXX from a mobile phone.

+1670
Mariana Island Country Code

What to Dial

  1. 1Dial 1, as for a US long-distance call. No 011: Mariana Island is in the North American Numbering Plan, but most US plans bill the call as international.
  2. 2Dial the area code 670, then the 7-digit number: 1 670-XXX-XXXX.
Calling a… Written in Mariana Island From a US landline From a cell phone
Mobile (670) XXX-XXXX 1 670-XXX-XXXX +1 670-XXX-XXXX
Landline (Northern Mariana Islands) (670) XXX-XXXX 1 670-XXX-XXXX +1 670-XXX-XXXX

X stands for any digit. More number types: Mariana Island phone number format.

Mobile or Landline?

Mariana Island had 42.3 landlines per 100 people in 2022.

Source: World Bank (ITU).

Calling Tips for Mariana Island

Best Time to Call

To reach someone between 9 AM and 8 PM in Saipan, call between 7:00 PM–6:00 AM EDT (4:00 PM–3:00 AM PDT). Mariana Island doesn’t change its clocks, so the gap moves by an hour when the US does.

Mariana Island is on UTC+10, 14 hours ahead of US Eastern Time right now.

Cost Saving Tips

  • VoIP services such as Google Voice or Vonage usually charge less per minute than a carrier's standard international rate.
  • WiFi calling apps (WhatsApp, Viber, FaceTime) are free when both parties have the app.
  • Check your carrier's international plan — many offer add-on packages.

Time Difference

US Eastern (EDT)
--:--
UTC-4
+14h
Mariana Island
--:--
UTC+10

Frequently Asked Questions

How do I call Mariana Island from the US?
Dial 1, the area code and the 7-digit number, for example 1 670-XXX-XXXX. No 011 is needed, but the call is billed as international.
How many digits is a phone number in Mariana Island?
10 digits after the country code +1.
What time should I call Mariana Island from the US?
Mariana Island is 14 hours ahead of New York (UTC+10 in Saipan). To reach someone between 9 AM and 8 PM there, call between 7:00 PM–6:00 AM EDT, or 4:00 PM–3:00 AM PDT on the West Coast. Mariana Island doesn't change its clocks, so the difference shifts by an hour when the US switches to or from daylight saving time.
How much does it cost to call Mariana Island?
It depends on your plan: many US plans charge per minute for international calls. Internet calling apps are free when both people have the same app.
Mariana Island Quick Info
Country Code +1670
ISO Code MP
Capital Saipan
Time Zone UTC+10
Exit Code (US) 011
Full Country Profile
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