The new area code is scheduled to be put into service next September (2016).
From that time until the following July (2017), there will be a "permissive dialing period" when callers can use either the old area code or the new area code.
After July (2017), use of the new area code will be mandatory.
1. The new area code is scheduled to be put into service next September 2016.
2. September 2016 – July 2017 callers can use either the old area code or the new area code.
3. After July 2017 use of the new area code will be mandatory.