According to www.donotcall.gov

"Your registration will not expire. Telephone numbers placed on the National Do Not Call Registry will remain on it permanently due to the Do-Not-Call Improvement Act of 2007, which became law in February 2008. Read more about it at https://www.ftc.gov/opa/2008/04/dncfyi.shtm"

Therefore, if you were previously registered on the Do Not Call list, you still are.

Registrations of active numbers never expired, since the listings were made permanent prior to the expiration of any listings. Numbers that have been disconnected or reassigned are purged from the list.

Any telemarketing calls from companies that you do not have a business relationship with, or have not requested contact from, are illegal, with the usual exceptions for non-profits and political bottom-feeders.