Area code 307

弗吉尼亚州区号304和681后第二个全州范围的重叠区号。 PUC orders "number pooling" to delay new area code （页面存档备份，存于互联网档案馆） Accessed334sed 30 January 2008 Saunders, Emilie Ritter

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

ZIP Code for Hackettstown, NJ, United States Postal Service. Accessed July 6, 2012. Zip Codes, State of New Jersey. Accessed September 12, 2013. Area Code

of New Jersey. Accessed August 21, 2013. Area Code Lookup - NPA NXX for Princeton, NJ （页面存档备份，存于互联网档案馆）, Area-Codes.com. Accessed August 29, 2013. A Brief

(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