Kansans that live in area codes 785 or 620 will be required to use 10-digit dialing when making local calls beginning Sunday. Local calls dialed with only seven digits will not go through, and a recording will inform you that your call cannot be completed as dialed. The change is being made to make it easier for persons in crisis to reach the National Suicide Prevention Lifeline that goes into effect in July. The Federal Communications Commission (FCC) approved 988 as the new abbreviated number for the National Suicide Prevention Lifeline. Any area code that uses the 988 prefix in telephone numbers is mandated to adopt 10-digit dialing. That includes Kansas area codes 785 and 620, which cover the majority of the state. In total, 82 area codes in 36 states will make the change.
Source: KSNT News

*Ten-digit dialing will go in effect on October 24th, but everyone can begin practicing it now.