On July 17, 2015 a new area code was approved for the North Western portion of the New York State including towns such as Syracuse and Utica. The new 680 area code will overlay existing NPA 315, therefore serving the exact same area. 10 digit dialing will become mandatory as a result.
- March 12, 2015 – start of permissive 10 digit dialing period (during this time callers are encouraged to dial all local calls using 10 digits, but may also continue using just 7 digits)
- February 11, 2017 – end of permissive 10 digit dialing (10 digit dialing becomes mandatory for all calls within NPA 315)
- March 11, 2017 – new area code 680 enters service
See official NANPA announcement and map of the new overlay area (PDF document)