What is NANP?

NANP is the North American Numbering Plan. These are any country whose international number begins with +1. This includes the US, Canada, territories, and other countries. The theory is someone can make a phone call within the NANP, and ideally be a domestic call. This however is not the case. Instead, countries that participate in the NANP may have different rates for outgoing calls. For example, someone in the US might be able to call Puerto Rico as a domestic call, but the Dominican Republic will be treated as an international call even though the country has 3 NPAs. This simply causes confusion, and should be addressed, however it is not. The countries and territories below are all a part of the NANP.

  • American Samoa
  • Anguilla
  • Antigua and Barbuda
  • Bahamas
  • Barbados
  • Bermuda
  • British Virgin Islands
  • Canada
  • Cayman Islands
  • Dominica
  • Dominican Republic
  • Grenada
  • Guam
  • Jamaica
  • Montserrat
  • Northern Mariana Islands
  • Puerto Rico
  • Saint Kitts and Nevis
  • Saint Lucia
  • Saint Vincent and the Grenadines
  • Sint Maarten
  • Trinidad and Tobago
  • Turks and Caicos Islands
  • United States of America
  • US Virgin Islands

Another issue is that not every country/territory supports dialing toll-free numbers. With that being said, someone in these locations will want to contact their telephone provider regarding toll-free numbers, and any additional cost. Even if there is a charge to the caller, the receiving party will still have to pay for the call at the rates they are charged.