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.
Dial *72 or 72# and listen for dial tone. Enter the number where you wish to forward calls. Long distance numbers: Enter 1 plus the10-digit phone number. For example, 1+ 3-digit area code + 7-digit phone number. Numbers that are not long distance but require an area code: Enter the 7-digit phone number.