Zone 1: North American Numbering Plan Calling Codes
The zones for country calling codes are organized principally by geographic location, but exceptions exist for political and historical alignments. Thus, the geographical indicators for zone 1 below are approximations only.
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| Calling Code | Country |
|---|---|
| +1 | Canada |
| +1 | United States, including United States territories: |
| +1 340 | United States Virgin Islands |
| +1 670 | Northern Mariana Islands |
| +1 671 | Guam |
| +1 684 | American Samoa |
| +1 | Many, but not all, Caribbean nations and some Caribbean Dutch and British Overseas Territories: |
| +1 787 / 939 | Puerto Rico |
| +1 242 | Bahamas |
| +1 246 | Barbados |
| +1 264 | Anguilla |
| +1 268 | Antigua and Barbuda |
| +1 284 | British Virgin Islands |
| +1 345 | Cayman Islands |
| +1 441 | Bermuda |
| +1 473 | Grenada |
| +1 649 | Turks and Caicos Islands |
| +1 658 / 876 | Jamaica |
| +1 664 | Montserrat |
| +1 721 | Sint Maarten |
| +1 758 | Saint Lucia |
| +1 767 | Dominica |
| +1 784 | Saint Vincent and the Grenadines |
| +1 809 / 829 / 849 | Dominican Republic |
| +1 868 | Trinidad and Tobago |
| +1 869 | Saint Kitts and Nevis |