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北米番号計画( NANP ) は、加盟国の領土を地理的番号計画エリア (NPA) に分割しています。各 NPA は、7 桁の各市内電話番号の前に付けられる 3 桁の数字で構成される 1 つ以上の番号計画エリア コード ( NPA コード、またはエリア コード) によって識別されます。複数のエリア コードを持つ番号計画エリアは、オーバーレイと呼ばれます。エリア コードは、地理的目的以外でも割り当てられます。NPA の番号付け規則では、先頭の数字0と1は許可されていません。 [1]末尾の 2 つの数字が同一であるエリア コードは、簡単に認識できるコード(ERC)です。2 番目の位置が9の NPA は、将来の形式拡張用に予約されています。
市外局番の番号順
使用されていない市外局番は斜体で表示され、割り当てられないコードは太字で表示されます。日付の列には、実装前の割り当て日または年、あるいはサービス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
U.S. Pacific territories
Non-geographic area codes
Assignment actions by year
- ^ The year may designate either the time of assignment or 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.
- ^ 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.
- ^ a b c Projected future activation date
Summary table
See also
- List of future North American area codes
- Original North American area codes
- Telephone numbers in the Americas
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.
- ^ a b c d e f g h https://www.nationalnanpa.com/enas/npasOverLast10YearsReport.do [bare URL]
- ^ a b "639 to be Sask.'s 2nd area code". CBC News. 14 June 2011.
- ^ a b c "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.
- ^ a b c "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.
- ^ a b "Planning Letter 81" (PDF). NANPA/Bellcore. 1991-08-15. Retrieved 2023-08-08.
- ^ a b c "Oldsmar, Florida Area Code". AreaCodeHelp.com. Archived from the original on 29 October 2022. Retrieved 29 October 2022.
- ^ a b "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, 2019-06-22.