What is an overlay?
An overlay adds a new area code to an existing geographic region. This means that two area codes will work in the same general area. New customers would be assigned the new area code. In some circumstances, customers may be able to choose between the old area code and the new one.
How are customers affected by an overlay?
All existing telephone numbers will remain the same. Businesses don't have to reprint their stationery, business cards and brochures unless they are adding a new public phone number. Adding an overlay code means that you will need to dial all ten digits of a phone number to complete a local call. The ten digits include the area code plus the 7-digit number.
Will I be charged toll rates for calls to the new area code?
No, not if the call was a local call before the new area code was introduced. Calls that are toll calls now would remain toll calls. For example, calls from Tucson to Phoenix would still be toll calls.
By law, call rates cannot be increased solely as a result of an area code split.
Will I have to change the way I dial emergency, directory assistance or long distance numbers?
Emergency dialing and directory assistance would not be affected. You would simply dial 911 or 411 as usual. You would still dial 1 + area code + seven digit number to complete a long distance call.