The article even notes that one firm lists separate phone numbers in its multiple phone book ads to enable better tracking of which ads generate legit clients. (legalblogwatch.typepad.com)
There are separate phone numbers for English, Spanish Reviews and recommendations about Las Vegas shows, hotels, casinos, restaurants and entertainment destinations in Sin City Nevada! (myintimcity.com)
For instance my wife and I have separate Google accounts and obviously separate phone numbers, but the Google Home will know which of us asked to make a call from it and use the correct number accordingly. (androidheadlines.com)