administrator of areacodes) NANPA.com: Areacodes maps (页面存档备份,存于互联网档案馆) (per state maps of area code assignments; some maps are outdated) Canadian Area Code Maps
(原始内容存档于2014-12-18). 美國地質調查局地名資訊系統:牛津鎮 Race, Hispanic or Latino, Age, and Housing Occupancy: 2010 Census Redistricting Data (Public Law 94-171) Summary
United States Census Bureau. [2012-11-25]. (原始内容存档于2021-07-09). Population and Housing Unit Estimates. United States Census Bureau. 2020-05-24 [2020-05-27]
Radio-television and Telecommunications Commission. 3 February 2017 [2021-10-24]. (原始内容存档于2022-01-22). CNA Exchange Codes list for 705, 249 Area Code Map of