My mother used to get calls for a lady named Glenda all the time, Eventually when my sister went to school her best friend turned out to be this Glenda's Daughter. there number was the same last 4 digits but the suburb prefix was for the other side of the suburb eg ours was xx35 theirs was xx33. It was more interesting that the daughter had the same name as mum. so all people would call to talk to a woman in her 40's and get and 8yo.
At one stage my mum's boss miss dialed the friends number at 7:00 on a Sunday and wasn't awake enough to realise he wasn't talking to my mum and that was why she didn't want to work that day.
My current mobile number was used for a painter in Melbourne, I've had the number for 3 years and still get calls for them. I am in Sydney though.
We have a home number that is almost the same as a real estate agent.