It’s another sign that Alberta is growing – we’re running out of phone numbers! To deal with the extra demand, we’re getting a new area code: 587. The area code isn’t specific to a geographic area like 403 (south) and 780 (north) are. Instead, it will co-exist with the other numbers, which means you’ll soon have to use 10 digits when making local calls:
After September 8-12, 2008, you won’t be able to make 7-digit local calls, but will have to dial the area code in front of the 7-digit phone number. You should plan ahead to ensure your telecommunications services are ready for the change.
To help prepare, the telecommunications providers have a phase-in plan as follows:
June 23 – 28, 2008: Permissive dialing period, you can make calls normally but will hear a recorded message reminding you to use ten digits.
June 29 – September 8, 2008: If you dial without entering an area code, you’ll hear the recording reminding you to use ten digits. Data transmission, like modems and fax machines, may not work unless you use ten digits.
After September 8, 2008: You’ll hear a message asking you to hang up and use ten digits.
All three digit numbers, such as 911, will remain the same.
For more information on the changes, check out dial10.ca.
MasterMaq's Blog 
This new idea of dialing area code is not very accomodating to a lot of people. I believe that there must be a better way to handle this.