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"air duct cleaning services" phone calls
For the last few months I've been getting unsolicited phone calls from "air duct cleaning services" almost daily. It's always from a different phone number, so I can't block them. I keep asking them ...
I think these offshore companies use an automated dailing system that transfers to a person on the first ring. Call Control kicks in before the first ring so it will never transfer. If they are manually dialling it would be very time consuming and inefficient. In that case I would make it even more time consuming for them. Say "Can you hold while I check my furnace to see when it was last cleaned?" Then put them on hold until they hang up.
How does one perform this "reverse lookup" of which you speak?
