北米番号計画の市外局番一覧

北米番号計画(NANP) は、加盟国の領土を地理的番号計画区域 (NPA) に分割します。各 NPA は、7 桁の各市内電話番号の先頭に付加される 3 桁の番号計画区域コード(NPA コード、または区域コード) によって識別されます。1 つの番号計画区域には複数の区域コードが割り当てられる場合があり、この構成は区域コードオーバーレイと呼ばれます。区域コードは、地理的以外の目的にも割り当てられます。区域コードの構文規則では、先頭に0と1 の数字を使用することはできません。 ^{[ 1 ]}末尾の 2 桁が同じ区域コードは、容易に識別できるコード(ERC)です。2 桁目に9がある NPA コードは、将来のフォーマット拡張のために予約されています。

市外局番（数字順）

使用されていない市外局番はイタリック体で表示され、割り当て不可能な市外局番は太字で表示されます。日付欄には、導入前の割り当て日または年、あるいは運用開始日が表示されます。

200～299

300～399

400～499

500～599

600～699

700～799

800～899

900～999

Area codes by country, state, province, and regions

Future area codes are in italic type face.

United States

Canada

Caribbean and Atlantic islands

Note that not all of the Caribbean and Atlantic islands are members of the North American Numbering Plan.

U.S. Pacific territories

Non-geographic area codes

Assignment actions by year

↑The table entries for each year list area code either by the time of assignment or, preferably where available, the in-service date. In-service dates are often difficult to ascertain for the early codes before they gained public recognition with gradual implementation of Direct Distance Dialing in the 1950 and 1960s. Starting with the late 1980s, assignment and in-service data was published timely in Planning Letters by the NANPA, fully accessible on their website.
↑The number of assigned and in-service NPAs differs, and is even uncertain before the start of the digital records by the NANPA in the 1990s.
↑None of the initially assigned 86 NPAs were actually in service in 1947. They were placed in service over a period of several years as No.4 toll-switching systems were installed, starting in late 1948.
↑Notes on Nationwide Dialing. American Telephone and Telegraph Company. 1955. p. II-3.
↑Notes on Distance Dialing. American Telephone and Telegraph Company. September 1956. p. II-3. The publication states that by 9/1956 109 codes had been assigned.
↑Notes on Distance Dialing. American Telephone and Telegraph Company. 1968. p. II-3.; by May 1967, all five TWX codes were reported as in service. 128 NPAs were in use, and NPA 950 was reserved. But uncertainty exists about the year between 1963 and 1967 in which these codes were actually installed.
↑"2022 Annual Report"(PDF). NANPA. 2021-12-31. p. 19. Retrieved 2025-02-18.
↑"2022 Annual Report"(PDF). NANPA. 2022-12-31. p. 19. Retrieved 2025-02-18.
↑"2023 Annual Report"(PDF). NANPA. 2023-12-31. p. 13. Retrieved 2025-02-18.
↑"2024 Annual Report"(PDF). NANPA. 2024-12-31. p. 13. Retrieved 2025-03-29.
↑Projected future activation date

Summary table

References

↑AT&T (1955) Notes on Distance Dialing
↑"Telecom Decision CRTC 2011-451". Canadian Radio-television and Telecommunications Commission. 28 July 2011. Retrieved 29 July 2011.
1 2"639 to be Sask.'s 2nd area code". CBC News. 14 June 2011.
1 2"CRTC approves new 474 area code for Saskatchewan | CTV News". 23 July 2018.
↑AT&T, Telegraph to Telephone - A History from Early Invention to 1950s (movie), YouTube, retrieved 17 July 2016.
↑"Telecom Decision CRTC 2010-213". Canadian Radio-television and Telecommunications Commission. 13 April 2010. Retrieved 23 August 2010.
1 2 3"Telecom Decision CRTC 2020-362". Canadian Radio-television and Telecommunications Commission. 28 October 2020. Archived from the original on 19 September 2022. Retrieved 27 October 2022.
↑"New 367 area code coming to eastern Quebec in November". Montreal Gazette. 23 May 2018. Retrieved 24 May 2018.
↑"New area codes in Canada". Telecommunications Alliance. Retrieved 24 May 2018.
1 2"Planning Letter 81"(PDF). NANPA/Bellcore. 1991-08-15. Retrieved 2023-08-08.
1 2 3"Oldsmar, Florida Area Code". AreaCodeHelp.com. Archived from the original on 29 October 2022. Retrieved 29 October 2022.
1 2"Tampa-Hillsborough to get a new area code. Say hello to the 656". Tampa Bay Times. Retrieved 2020-05-08.
↑"NPA 205 and 659 All-Services Overlay (Alabama)"(PDF). NANPA. 8 October 2018. Retrieved 30 October 2022.
↑"B.C. is getting a new area code next year". CBC News. 14 February 2018. Retrieved 19 February 2018.
↑"PL-423: Introduction of NPA 721 (Sint Maarten)". North American Numbering Plan Administration. 2011-07-27. Archived from the original(PDF) on 2019-01-08. Retrieved 2011-09-01.
↑"New area code 825 in Alberta". Telus. TELUS Communications Company. Archived from the original on 2014-11-21. Retrieved 7 July 2023.
↑"Implementation of the 833 NPA for Toll-Free Services"(PDF). NANPA. 26 April 2017.
↑"NPA 839 to overlay NPA 803 (South Carolina)"(PDF). NANPA. 18 September 2018. start of mandatory 10-digit dialing April 25, 2020
↑Wong, Wailin (2009-08-10). "Chicago's newest area code: 872". Chicago Tribune. Archived from the original on 2009-08-13.
↑"Planning Letter 331: Recovery of NPA Codes 880, 881, 882 (Paid Toll-Free Service) Scheduled for 1 April 2004"(PDF). North American Numbering Plan Administration. 2003-06-02. Archived from the original(PDF) on 2008-07-05. Retrieved 2008-08-28.
↑"Relief Implementation Plan"(DOCX). Canadian Numbering Administration Consortium.
↑Dwyer, Colin (December 13, 2019). "FCC Approves Plan For 3-Digit Suicide Prevention Number Similar To 911". NPR. Archived from the original on January 5, 2020. Retrieved October 18, 2020.
↑"NANPA: Transition to 10-digit dialing for 988". North American Numbering Plan Administrator. Retrieved 1 February 2024.
↑"NPA Reports". North American Numbering Plan Administrator. Archived from the original on 2019-06-23. Retrieved 2019-06-22.

[24] The table entries for each year list area code either by the time of assignment or, preferably where available, the in-service date. In-service dates are often difficult to ascertain for the early codes before they gained public recognition with gradual implementation of Direct Distance Dialing in the 1950 and 1960s. Starting with the late 1980s, assignment and in-service data was published timely in Planning Letters by the NANPA, fully accessible on their website.

[25] The number of assigned and in-service NPAs differs, and is even uncertain before the start of the digital records by the NANPA in the 1990s.

[26] None of the initially assigned 86 NPAs were actually in service in 1947. They were placed in service over a period of several years as No.4 toll-switching systems were installed, starting in late 1948.

[27] Notes on Nationwide Dialing. American Telephone and Telegraph Company. 1955. p. II-3.

[notes56-28] Notes on Distance Dialing. American Telephone and Telegraph Company. September 1956. p. II-3. The publication states that by 9/1956 109 codes had been assigned.

[att1968-29] Notes on Distance Dialing. American Telephone and Telegraph Company. 1968. p. II-3.; by May 1967, all five TWX codes were reported as in service. 128 NPAs were in use, and NPA 950 was reserved. But uncertainty exists about the year between 1963 and 1967 in which these codes were actually installed.

[30] "2022 Annual Report"(PDF). NANPA. 2021-12-31. p. 19. Retrieved 2025-02-18.

[31] "2022 Annual Report"(PDF). NANPA. 2022-12-31. p. 19. Retrieved 2025-02-18.

[32] "2023 Annual Report"(PDF). NANPA. 2023-12-31. p. 13. Retrieved 2025-02-18.

[33] "2024 Annual Report"(PDF). NANPA. 2024-12-31. p. 13. Retrieved 2025-03-29.

[projected-34] Projected future activation date

[1] AT&T (1955) Notes on Distance Dialing

[2] "Telecom Decision CRTC 2011-451". Canadian Radio-television and Telecommunications Commission. 28 July 2011. Retrieved 29 July 2011.

[cbc_2011-06-14-3] 1 2"639 to be Sask.'s 2nd area code". CBC News. 14 June 2011.

[ctvnews_2018-07-23-4] 1 2"CRTC approves new 474 area code for Saskatchewan | CTV News". 23 July 2018.

[5] AT&T, Telegraph to Telephone - A History from Early Invention to 1950s (movie), YouTube, retrieved 17 July 2016.

[6] "Telecom Decision CRTC 2010-213". Canadian Radio-television and Telecommunications Commission. 13 April 2010. Retrieved 23 August 2010.

[crtc_2020-10-28-7] 1 2 3"Telecom Decision CRTC 2020-362". Canadian Radio-television and Telecommunications Commission. 28 October 2020. Archived from the original on 19 September 2022. Retrieved 27 October 2022.

[8] "New 367 area code coming to eastern Quebec in November". Montreal Gazette. 23 May 2018. Retrieved 24 May 2018.

[9] "New area codes in Canada". Telecommunications Alliance. Retrieved 24 May 2018.

[pl81-10] 1 2"Planning Letter 81"(PDF). NANPA/Bellcore. 1991-08-15. Retrieved 2023-08-08.

[oldsmar_area_code-11] 1 2 3"Oldsmar, Florida Area Code". AreaCodeHelp.com. Archived from the original on 29 October 2022. Retrieved 29 October 2022.

[tampabay_2020-05-08-12] 1 2"Tampa-Hillsborough to get a new area code. Say hello to the 656". Tampa Bay Times. Retrieved 2020-05-08.

[13] "NPA 205 and 659 All-Services Overlay (Alabama)"(PDF). NANPA. 8 October 2018. Retrieved 30 October 2022.

[14] "B.C. is getting a new area code next year". CBC News. 14 February 2018. Retrieved 19 February 2018.

[15] "PL-423: Introduction of NPA 721 (Sint Maarten)". North American Numbering Plan Administration. 2011-07-27. Archived from the original(PDF) on 2019-01-08. Retrieved 2011-09-01.

[area_code_825-16] "New area code 825 in Alberta". Telus. TELUS Communications Company. Archived from the original on 2014-11-21. Retrieved 7 July 2023.

[17] "Implementation of the 833 NPA for Toll-Free Services"(PDF). NANPA. 26 April 2017.

[18] "NPA 839 to overlay NPA 803 (South Carolina)"(PDF). NANPA. 18 September 2018. start of mandatory 10-digit dialing April 25, 2020

[19] Wong, Wailin (2009-08-10). "Chicago's newest area code: 872". Chicago Tribune. Archived from the original on 2009-08-13.

[20] "Planning Letter 331: Recovery of NPA Codes 880, 881, 882 (Paid Toll-Free Service) Scheduled for 1 April 2004"(PDF). North American Numbering Plan Administration. 2003-06-02. Archived from the original(PDF) on 2008-07-05. Retrieved 2008-08-28.

[21] "Relief Implementation Plan"(DOCX). Canadian Numbering Administration Consortium.

[22] Dwyer, Colin (December 13, 2019). "FCC Approves Plan For 3-Digit Suicide Prevention Number Similar To 911". NPR. Archived from the original on January 5, 2020. Retrieved October 18, 2020.

[23] "NANPA: Transition to 10-digit dialing for 988". North American Numbering Plan Administrator. Retrieved 1 February 2024.

[35] "NPA Reports". North American Numbering Plan Administrator. Archived from the original on 2019-06-23. Retrieved 2019-06-22.

[ 1 ]