the caller ID said Horton Chip from 206-324-7895. The individual on the line knew my name and address and she said she was calling about a furnace inspection. When I said that our furnace had been inspected the line went dead. I agree that blocking numbers is a good idea. But, there is a limit to the number of blocks my system will allow. Just watch out for any Chip Hortons unless he is a race car driver in the south!