Chances are strong that Harrisburg, Dauphin County, and Lancaster County will retain 717, while York and Cumberland Counties and their surrounding areas including Gettysburg and Adams County will find themselves reprogramming phones to accommodate their as yet undetermined new area code. (effectivecoverage.com)
The actual phone number may be the same, but you won't be able to reach the breeder without the proper area code and there have been many new area codes added in the last few years. (puppiesdogs.org)
Interestingly, the CRTC is involved in deciding when and where new area codes are required. (slaw.ca)