Telephone National Number Schemes Issues

Data storage and user interface issues

  • “US” or “USA” is not the appropriate label in Scoutbook or my Scouting Tools forms for all of telephone “country code 1”
  • Number of digits following the country code may not be long enough in forms and apps.

Previous and related discussion

Version

Created 2 Febuary 2022, version 2020-02-02-D DRAFT

Introduction

Dialing Procedure

The national number following the country code can vary in length by country. Dialing procedures vary by your localion, telephone provider and by the smartphone app being used.

The international “country code” for the North American Numbering Plan (NANP) is “1”. “Country codes” for dialing are “1 to 3 digits” in length. The “001” may be a display or form format.

Some telephone system country codes

United States Awardee Immunization Websites | CDC links lists the following locations including US “dependant areas”. Telephone country codes have been added to the list.

Location Country Code Note
American Samoa 1
Guam 1
Marshall Islands 692 Republic of the Marshall Islands - mixed presidential-parliamentary system in free association with the US per Marshall Islands - The World Factbook (cia.gov) (2022)
Micronesia 691 Federated States of Micronesia (FSM) - federal republic in free association with the US per Micronesia, Federated States of - The World Factbook (cia.gov) (2022)
Northern Mariana Islands (CNMI) 1 Commonwealth of the Northern Mariana Islands (CNMI) - a commonwealth in political union with and under the sovereignty of the US per Northern Mariana Islands - The World Factbook (cia.gov) (2022)
Palau 680 Republic of Palau, “Beluu er a Belau”, presidential republic in free association with the US per Palau - The World Factbook (cia.gov) (2022)
Puerto Rico 1
Virgin Islands, United States 1

Note: For dates of free association with the United States see “Dependant Areas” section in United States - The World Factbook (cia.gov).

North American Numbering Plan

Per the North American Numbering Plan Administrator - About us webpage https://www.nationalnanpa.com/about_us/

The North American Numbering Plan (NANP) is an integrated telephone numbering plan serving 20 North American countries that share its resources. These countries include the United States and its territories, Canada, Bermuda, Anguilla, Antigua & Barbuda, the Bahamas, Barbados, the British Virgin Islands, the Cayman Islands, Dominica, the Dominican Republic, Grenada, Jamaica, Montserrat, Sint Maarten, St. Kitts and Nevis, St. Lucia, St. Vincent and the Grenadines, Trinidad and Tobago, and Turks & Caicos.

Some NANP areas that are not states or Washington, D.C.

The NANP Country / Territory Map page https://www.nationalnanpa.com/area_code_maps/area_code_maps_Country_Territory.html includes the following (and more).

Area Code Country / Territory Location
340 US Virgin Islands Caribbean, islands between the Caribbean Sea and the North Atlantic Ocean, east of Puerto Rico
670 Northern Marianna Islands (CMNI) Oceania, islands in the North Pacific Ocean, about three-quarters of the way from Hawaii to the Philippines
671 Guam Oceania, island in the North Pacific Ocean, about three-quarters of the way from Hawaii to the Philippines
684 American Samoa Oceania, group of islands in the South Pacific Ocean, about half way between Hawaii and New Zealand
787, 939 Puerto Rico Caribbean, island between the Caribbean Sea and the North Atlantic Ocean, east of the Dominican Republic

References

  • North American Numbering Plan Administrator. “North American Numbering Plan Administrator.” [This site provides information about the North American Numbering Plan (NANP) and its administration. The NANP is the numbering plan for the Public Switched Telephone Network for Canada, the US and its territories, and some Caribbean countries.]. Accessed 2022-02-02. https://www.nationalnanpa.com/.
  • Telecommunication Standardization Bureau of ITU. 2011. “Dialling procedures (international prefix, national (trunk) prefix and national (significant) number (in ITU-T Recommendation E.164 (11/2010) - Annex to ITU OB 994-E.” Operational Bulletin 994-E. Geneva, Switzerland: International Telecommunication Union. https://handle.itu.int/11.1002/pub/8056d56c-en.
  • The World Factbook (cia.gov)

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Version

Created 2 Febuary 2022, version 2020-02-03-Y DRAFT