She asked questions about housing and mortgage, how much is my rent, etc. I called back and the number was already disconnected. Who are those people?

I keep receiving messages from some female who states her name is Rachel from Card Holder Services and she's calling to lower my interest rates (regarding my credit card) and that this is the final call.  Call Display picks up 1-806-653-1192 but the information the messaging service returns is all 0's for the number.  I'm filing a report with my phone service provider, the RCMP and the CRTC.  This is a scam.

I just received a phone call from this phone number, but did not answer it... when I tried calling it back, it says that the phone number has been disconnected and is no longer in use.

Yes, I also received a call re. housing and mortgage.  I thought the caller said CMHC - Canada Mortgage and Housing Corporation.  Asked what kind of home I lived in and whether I was the owner.

I got a call with similar identification about CHMC, I am in area code 416, and area code 806 is in Texas ?