This IS the Canadian Diabetes Foundation. I gave them my number (& allowed them to call me) because I am a regular contributor  to the CDF. You may request that your number be removed from their database, but that might not be sufficient.I do not know about the DNC (Do Not Call) rules precisely, but many (meaning LOTS) of DNC requests have resulted in my getting calls from other telemarketing a-holes. In this case....... caveat emptor .... Let the buyer beware...There are too many ways for a biz to circumvent federal rules such as Do Not Call. Since I use a cell phone as my primary phone connection, I have ID'd this number as "CDA Spam". Thus, if called, I do not answer. (or do, if I have a donation on hand) Easy. For me, at least... (btw, I am a Fido customer)

Try calling the Clothesline number 1+1 800-505-5525. They'll take your number off the call list.

Got a call from (613) 746-4633, which is a Bell managed residential or business land line in Ottawa, ON, from my search.

Yes and take a look at the prices at these so called discount stores tripled in the last several years, more expensive than wallmart LOL.

This person calls often and does not say anything or leave a message.
This is quite annoying and would like it to stop.

They've been calling me too....looked it up....this is what I found....Probably looking for donations, if you have donated before....Hope this helps... :)Canadian Diabetes Association45 Montreal Rd, Vanier K1L 6E8, Ontariop: (613) 746-4633