The Supreme Court has denied a challenge to the federal Do Not Call list. Telemarketing companies had filed an appeal, saying the registry violated First Amendment rights because some groups were exempt from the rules.

People have entered more than 57 million phone numbers into the national registry to protect their privacy and stop telemarketing calls. Experts in the industry predicted 2 million out of 6.5 million telemarketers will lose their jobs within 2 years if the Do Not Call list was upheld.