Regarding 503-403-1063 "realtor.com i google": They call about homes for sale or rent and seem to be setting up situations that may include:

1)Ascertaining if no one is home in order to break in
2) Offering fake rental or sales contracts and taking money for rental or sale of homes they do not own or represent.

Report the call to the authorities: FCC, FTC, State Attorney General, police, etc.