List: St. Louis area codes impacted by mandatory 10-digit dialing

10-digit dialing required for 515 and 319 area codes starting Sunday

Area code required for dialing Phoenix metro phones in August

10-Digit Dialing for Local Calls

Two area codes in Minnesota required to use 10-digit dialing | FOX 9 KMSP

Ten-digit dialing becomes mandatory within 803 area code on April 25

513, 859 area codes to dial 10 digits for local calls

Mandatory 10-digit dialing set to begin for Missouri area code

10 digit dialing coming to 970 and 719 area codes

10-digit dialing changes coming to the 616 area code

10 DIGIT DIALING TO BE REQUIRED IN SOME ARIZONA AREA CODES

Get That Dialing Finger Ready, New Area Code Will Require More Button Presses

San Diego callers will be required to use area codes for local calls

Area code required for all local NH calls starting Sunday

10-digit dialing coming to 970 and 719 area codes

Starting Oct. 24, all phone calls will require an area code, including local calls

The 309 area code must transition to 10-digit dialing by Sunday

Need to dial area code for local numbers? Here's why

Why you’ll soon have to hit ‘1’ when dialing a '209' area code phone number

Needed 10-digit dialing in 812 area code delayed