Its overlay area code is the 289 area code. It was introduced to the public in the middle of 2001. The first Mississauga (Malton) area code was all used up in the later months of 2005, thus the 289 area code will become the area code of phone numbers that will be given starting from that time onwards.
Direct inward dialing (DID), also called direct dial-in (DDI) in Europe and Oceania, is a telecommunication service offered by telephone companies to subscribers who operate a private branch exchange (PBX) system.
Lift the receiver and listen for the dial tone. Enter *74. Press a number between 2 and 9. This is your Speed Dial digit. Dial the phone number you want to assign to this digit. Note: For domestic long-distance calls, dial 1 plus the area code and then the phone number.