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.
Virtual phone numbers â sometimes referred to as DID for direct inward dialing or DDI for direct dial-in in Europe â are phone numbers that aren't associated with a direct phone line, but instead redirect incoming calls to any number of lines chosen by the owner of the virtual phone number.