Yes, when a persons phone number in their profile is crossed out, it usually means that they are on the Federal Do not Call list . Phone numbers in your database can also be crossed out, or appear with a strike through it, for the following reasons:

-That person has a bad mobile number (only their mobile number will be crossed out) 
-That person is on the Federal Do not Call list ( only their home/ work phone number will be crossed out)
-That person is on the Federal Do not Contact list (all contact information will be crossed out)