Glossary and Definitions ...
- Area Code Overlay
- An Overlay refers to the situation in which two (or more) area codes (eg- 403, 587) serve the same geographic area. In the case of Wrentham, area code (587) is the Overlay for area code (403).
The Overlay is necessary when the geographic area requires (or expects to need) more phone numbers than can be provided by a single area code.
When an Overlay is present, 10-digit dialing becomes necessary for all calls, even if local. There are different types of Overlays, with each of the different Overlays having its own characteristics and dialing requirements.
If you would like to learn more about Overlays, we suggest the Wikipedia entry for Overlays.
- Canadian Postal Code (FSA & LDU)
- The Canadian Postal Code is a 6-character alpha-numeric code (a mixture of the alphabet and numbers) that is used to improve the efficiency of mail sorting and delivery.
The first three characters are called the 'Forward Sortation Area' (or the 'FSA') and indicates a geographical area within Canada. The first and last characters are 'A' through 'Z' and the middle character is always numeric ('0' through '9'). In this case, the FSA for Wrentham is 'T0K'.
The last three characters are called the 'Local Delivery Unit' (or the 'LDU') and they indicate a location or place within the FSA. The first and last characters are always numeric ('0' through '9') and the middle character is always alphabetic ('A' through 'Z').
We only have the FSA for Wrentham and not the LDU.