How to Dial Other Countries in the North American Numbering Plan

Phone Number Formats to Call Any NANP Country

Countries that participate in the North American Numbering Plan use a highly standardized 11-digit telephone phone format.

Key features of the NANP numbering plan are:

• All NANP countries share the same country code of '1'
• All NANP countries utilize area codes and all area codes are 3-digits long*
• All NANP countries have local subscriber numbers that are 7-digits long
• All NANP countries utilize the same phone number format for both landline and mobile phones.

Because all NANP countries use the same country code, the NANP numbering scheme differentiates specific locations - whether a country like Jamaica, or a city like Los Angeles, by using distinct area codes.

To make an international phone call to a NANP country, you need to dial a phone number formatted as follows:

NANP Landline Phone Numbers

ddd	1	aaa	nnn nnnn
international access code	country code	3-digit area code	7-digit landline number

NANP Mobile Phone Numbers

ddd	1	aaa	nnn nnnn
international access code	country code	3-digit area code	7-digit mobile number

If the NANP phone number you have does not contain the full 10-digit phone number (not including country code), then you'll need to double check to find the correct number.

Dialing Steps to Call a NANP Country

To call a NANP landline or mobile phone number from any country in the world, follow this dialing procedure.

1. Dial your int'l access code / IDD:  ddd

Dial your country's international access code (aka international direct dial code or IDD) to initiate a phone call to a NANP country. Your IDD is typically a 2-4 digit number.

Lookup international access codes here.

Some mobile operators may not require dialing an IDD and/or may allow use of substitute characters (such as '+').

2. Dial NANP country code: + 1 

All NANP countries utilize the same country code. If your NANP destination phone number starts with a ' 1 ' - e.g., 1 604 454 8180, then this serves as the country code. Don't dial ' 1 ' twice.

3. Dial a 10-digit NANP phone number

To reach a NANP landline number or a NANP mobile phone, dial a 10-digit number as follows:

a. Dial a 3-digit area code:  aaa 

b. Dial a 7-digit local subscriber number: nnn nnnn

Find NANP area codes

Countries in the NANP

There are 19 countries that have adopted the North American Numbering Plan. These include the United States (and it's territories), Canada, and many Caribbean nations.

Here's a complete list:

NANP also includes all US territories, such as:

For more information on NANP, please visit the NANP official website.