Area code 664

a new area code. Say hello to the 656.. Tampa Bay Times. [2020-05-08]. （原始内容存档于2020-05-08） （英语）.  Rosenthal, Phil. Chicago's newest area code: 872. 芝加哥論壇報

Area Code - UK Area Code Finder. Area-codes.org.uk. [2013-02-11]. （原始内容存档于2013-02-08）.  （01987）Ofcom. Telephone Numbering : Creation of New Area Code

  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

History of Salt Lake City. Pruett Publishing Co. 1984. ISBN 978-0-87108-664-8.  Bagley, Will. World Book Encyclopedia S-Sn. World Book Inc. 2004: 76–76a

(PDF)于2017-02-13）.  Code of Laws – Title 5 – Chapter 7 – Municipal Corporations. Scstatehouse.gov. [2018-07-25]. （原始内容存档于2018-06-30）.  Code of Laws – Title