300 Area Code

The 300 area code is NOT a valid area code. This area code is NOT officially assigned to a known Numbering Plan Area (NPA). The 300 area code is not assigned to a city/state location.

In most cases with invalid area codes like 300, tend to be used by phone numbers from telemarketing companies.

Last Searched Area Codes
Area CodeCity/State
620St John, Kansas
270Custer, Kentucky
360Castle Rock, Washington