北美地区电话号码计划 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "北美地区电话号码计划" in Chinese language version.

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areacodehelp.com

United States Area Codes. www.areacodehelp.com. [2018-09-27]. （原始内容存档于2021-11-29）.

Telecom Notice of Consultation CRTC 2021-191. Canadian Radio-television and Telecommunications Commission. 2021-06-03 [2021-06-21]. （原始内容存档于2021-11-24）.

NANPA : Number Resources - NPA (Area) Codes. [2021-10-24]. （原始内容存档于2015-12-04）.
PL-418: Introduction of NPA 721 (Sint Maarten) (PDF). North American Numbering Plan Administration. 2011-01-05 [2011-08-08]. （原始内容存档 (PDF)于2012-07-26）. Updated by: PL-423: Updated Information - Introduction of NPA 721 (Sint Maarten) (PDF). North American Numbering Plan Administration. 2011-07-27 [2011-08-08]. （原始内容存档 (PDF)于2019-01-08）.

Contacts in the Countries Participating in the North American Numbering Plan (PDF). [2021-10-24]. （原始内容存档 (PDF)于2016-01-05）.
Canadian Numbering Administrator. [2021-10-24]. （原始内容存档于2006-07-01）.
NANPA : Number Resources - NPA (Area) Codes. [2021-10-24]. （原始内容存档于2015-12-04）.
Planing Letter 556: Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline) (PDF). North American Numbering Plan Administrator. 2021-01-08 [2021-03-09]. （原始内容存档 (PDF)于2021-04-03）.
Telecom Notice of Consultation CRTC 2021-191. Canadian Radio-television and Telecommunications Commission. 2021-06-03 [2021-06-21]. （原始内容存档于2021-11-24）.
United States Area Codes. www.areacodehelp.com. [2018-09-27]. （原始内容存档于2021-11-29）.
Call 658 ... Jamaica gets additional area code, 10-digit dialling becomes mandatory May 2018. [2021-10-24]. （原始内容存档于2021-06-13）.
PL-418: Introduction of NPA 721 (Sint Maarten) (PDF). North American Numbering Plan Administration. 2011-01-05 [2011-08-08]. （原始内容存档 (PDF)于2012-07-26）. Updated by: PL-423: Updated Information - Introduction of NPA 721 (Sint Maarten) (PDF). North American Numbering Plan Administration. 2011-07-27 [2011-08-08]. （原始内容存档 (PDF)于2019-01-08）.

PL-418: Introduction of NPA 721 (Sint Maarten) (PDF). North American Numbering Plan Administration. 2011-01-05 [2011-08-08]. （原始内容存档 (PDF)于2012-07-26）. Updated by: PL-423: Updated Information - Introduction of NPA 721 (Sint Maarten) (PDF). North American Numbering Plan Administration. 2011-07-27 [2011-08-08]. （原始内容存档 (PDF)于2019-01-08）.