https://maps.princeton.edu/catalog/princeton-9w032716w
U.S. Telephone Area Code Boundaries, 2018 - Digital Maps and Geospatial Data | Princeton University
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https://www.npanxxsource.com/
NPA NXX Telephone Area Code / Prefix and Exchange Databases
United States and Canadian NPA NXX area code prefix, local calling areas and wireless telephone number identification reference databases updated monthly.
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https://www.ukareacode.co.uk/area-code/01260
01260 area code. Telephone number dialling code in the UK
Information about Congleton telephone area code. Dialing codes for every location in the United Kingdom.
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https://www.ukareacode.co.uk/area-code/01329
01329 area code. Telephone number dialling code in the UK
Information about Fareham telephone area code. Dialing codes for every location in the United Kingdom.
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