Please stop trying to spread misinformation.
Which part of "When You Might Need to Register Again
How long does my phone number stay registered?
Telephone numbers on the Registry don’t expire. We only remove your number when it’s disconnected and reassigned, unless you ask us to remove it.", from https://www.consumer.ftc.gov/articles/0108-national-do-not-call-registry
led you to believe you have to register every 5 years?