Matt Nemeth / 90.5 WESA

A Pennsylvania law is ending a requirement that telephone customers who want to remain on the state's do-not-call registry have had to renew their listing every five years.

Democratic Gov. Tom Wolf on Friday signed changes to the Telemarketer Registration Act that also allow business phone customers to sign up for the do-not-call list.

John Raoux / AP

Pennsylvania’s attorney general is touting an agreement he and other attorneys general have made with a number of the country’s biggest phone companies.

It’s aimed at cracking down on unwanted robocalls.

Not all robocalls are illegal.

But many are—particularly ones from unknown numbers trying to sell people things without their consent.