Who called from 6135471739

Got a phone call from this number - no voicemail left.  Tried calling it and it rang about 20 times with no voicemail/answering machine, so no idea who it was.

I received two calls from a number that shows as 011-613-547-1739.  Once nobody was home, no message was left, and once I picked up and they hung up.  I tried calling back but it says that my call cannot be completed as dialed.

Call from this number, when I answer they ask if i want them to clean air ducts. When i tell them i dont have air ducts they hang up.