The 411 on area codes: How new tech and population growth fuels the need for more digits

New area code number announced for the 573 area code region

Phone Numbers Telephone numbers consist of seven digits; the first digit cannot be 0 or 1. How many telephone numbers are possible? | Numerade

Answered: How many phone numbers are possible in the (770) area code for the form ABC-XXXX if: A is restricted to 1-9, B is restricted to 4-9, but C and X can be any… | bartleby

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Mandatory 10-digit dialing begins for 540 area code