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.
In this age of ubiquitous 10-digit dialing (3 digit area code + 7 digit phone number), cell phones, and unlimited calling plans, why must we dial 1 for a long distance?Back in olden days, mechanical switches needed the 1 (as well as the second digit of the area code to be 0 or 1) to route properly.n this age of ubiquitous 10-digit dialing (3 digit area code + 7 digit phone number), cell phones, and unlimited calling plans, why must we dial 1 for a long distance? Back in olden days, mechanical switches needed the 1 (as well as the second digit of the area code to be 0 or 1) to route properly.