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.
1 To block Caller ID number and/or name from being displayed on someone else's caller identification device dial *67 before dialing the actual phone number; 2  This option only applies to every single phone call; therefore, you should dial *67 for every call you want your ID blocked.