purchasing (free) DIDs

Hi, I am interested in starting a small project for voip in home. I am looking to purchase (or obtain for free) DIDs number. I looked into didww.com for purchasing dids but I don’t want to pay a monthly cost of 1$ per month. So I was wondering does anyone know where didww or another other provider get their DIDs number from, I mean the source?
I looked into freephoneline.ca but the numbers are assigned to their own server but I would like to use it with my local server.

I am located in Canada