The area code, which covers southwest Ohio, including Butler County and parts of Warren County, is expected to run out of available phone numbers in the fourth quarter of 2023.

Area code overlay is the introduction of a new area code to a region. In this case, 457 is being added to the 318 area code ...

DC will be transitioning to a new area code, 771, after reaching a capacity for 202 numbers. Many on social are wondering if this means they need to change numbers.

The singular "406" area code is a major part of Montana's branding, evidenced by the fact that there are 1,900 active businesses using some variation of "406" in their title.

Iowa residents in the 515 and 319 area codes will soon have to get used to dialing all 10 digits of a phone number when making calls.

The San Fernando Valley gets an additional area code, and it changes the way numbers must be dialed.