Area Code 421
Area Code 421 Assignment
Area Code 421 History:
Area Code 421 has not been assigned for use by the North American Numbering Plan Administrator. Area Code 421 is officially planned as a General Purpose area code which is typically assigned to a geographic area. If you receive a phone call from area code 421 it is a spam call. Any phone number such as 421-xxx-xxx does not exist.
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