These calls come under a lot of different numbers however they are all registered to Paetec Communications. They have a web site that is registered as follows:
600 WILLOWBROOK OFFICE PARK
716-340-2737 fax: - 716-340-2509
This is the admin info for the people upstairs.
A lot more effective than talking to human firewalls.
The last site I posted this info on, Paetec immediately posted their complaint number and e-mail address after my entry in an apparent attempt to divert calls from this number, so it must be jamming them up. It's about time they felt how it feels to be interrupted from important business with annoying phone calls.
GO GET EM!