Area code 409
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北美电话区号列表
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
北美电话区号870
、派恩布拉夫、德克萨卡纳、埃尔多拉多和西孟菲斯。 34°12′N 92°00′W / 34.2°N 92.0°W / 34.2; -92.0 (Area code 870) List of exchanges from AreaCodeDownload.com, 870 Area Code
北美电话区号214、469、972和945
AreaCodeDownload.com, 214 Area Code List of exchanges from AreaCodeDownload.com, 469 Area Code List of exchanges from AreaCodeDownload.com, 972 Area Code List of exchanges
Testing in Nevada. www.dreamlandresort.com. [2024-08-18]. Groom Lake (GNIS code 840824). Geographic Names Information System. United States Geological Survey
(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