Area Code Overlay?

[Grrilla]

Does an "overlay" of an area code refer to an original area code that is still usable in an area that is being subdivided and assigned one or more new area codes? ie Manhattan 212 overlays and will work for 646 for a set time duration enabling 646 to become established.

 

[IAmAllanShore]

HOW ARE NEW AREA CODES PUT IN PLACE?
New area codes are usually implemented in one of two ways.

First, they can be implemented through a "geographic split." The geographic area using an existing area code is split into two parts, with some telephone customers continuing to be served through the existing area code while others must change to a new area code.

New area codes can also be implemented through an "area code overlay", in which the new area code covers the same geographic areas as an existing code, but with new customers in that area being assigned to the new, or overlay, area code.

www . psc . state . fl . us/industry/telecomm/areacode/areacodefaq.cfm

 

[Grrilla]

TX Allan. I am assuming that w/ the overlay system of assignment, one's next door neighbor could have a different area code if he/she is a new customer.

 

[IAmAllanShore]

Yup, that's my interp also.
I seem to remember my parents moving in Knoxville to a new place in the middle of an area code change and not having the option to keep the old area code, but just the new one (865 - Spells "VOL" on the phone ).
-Allan