426 area code location
Home | 426 Area Code. The 426 area code is NOT a valid area code. This area code is NOT officially assigned to a known Numbering Plan Area (NPA). The 426 area code is not assigned to a city/state location. In most cases with invalid area codes like 426, tend to be used by phone numbers from telemarketing companies.he 426 area code is NOT a valid area code. This area code is NOT officially assigned to a known Numbering Plan Area (NPA).