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.
To use our How To Dial tool, simply select the country you're dialing from, then the country you're dialing to, then input the area code and phone number you'd like to call and the complete number to dial will be displayed.1  Dial the International Direct Dialing (IDD) number.o use our How To Dial tool, simply select the country you're dialing from, then the country you're dialing to, then input the area code and phone number you'd like to call and the complete number to dial will be displayed. 1  Dial the International Direct Dialing (IDD) number.