Approved by the Pennsylvania Public Utility Commission on October 27, 2016 the new area code 223 will serve the south portion of the state currently using area code 717, covering cities such as Lancaster, Gettysburg, Harrisburg. There will be a permissive 7/10 digit dialing period and then all calls in the area will be dialed using 10 digits.
- March 4, 2017 – permissive 7/10 digit dialing period begins (local calls within area code 717 may be dialed using both 7 or 10 digits, with the latter being encouraged)
- August 26, 2017 – mandatory 10 digit dialing begins
- September 26, 2017 – area code 223 enters service
See official announcement from NANPA and other info (PDF document)