Who called from 6048007897

received call but suspicious of it being junk, so i didn't answer, and they didn't leave message

Tried calling and starts ringing and then hangs up

Well, they keep switching number, from (416)416-4164 to (416)200-1000. Now this. This must be a scam.

Must be another (same) duct cleaner!

All of the other calls I've received (and blocked) from a 604 area code have been credit card scams, so this is probably another one.