Registering your phone numbers with the providers is completely optional and is in no way required, however, doing so can make a big difference in the health of your phone numbers! The best part is that you can register them continuously, so this may elongate the amount of time you can keep a number and the health overall!
NOMOROBO
An email needs to be sent to Nomorobo on “reports@nomorobo.com” and inform them to remove the erroneously flagging from your numbers.