Five years ago, in June 2003, consumers were first able to list their phone numbers on the National Do Not Call Registry and thereby avoid many types of telemarketing calls. Original registrations were set to expire after five years. But as the first wave of Do Not Call (DNC) registrations faced expiration in July 2008, both the Federal Trade Commission (FTC) and the Federal Communications Commission (FCC) have taken steps to make DNC registrations permanent. The FTC and FCC jointly administer the National DNC Registry, which contains almost 160 million telephone numbers.

Telemarketers should confirm that their calling systems are not set to begin calling numbers five years after an original DNC registration. A DNC request now is lifted only if: (a) the seller has an "established business relationship" with the called person, which has not been terminated; (b) the called person gives his or her signed, written consent to receive telemarketing calls, including the number to be called; (c) a telephone company reports to the FTC that the registered phone number has been disconnected and reassigned; or (d) the consumer cancels the DNC registration.