I got call on my cellphone number which is on DNC list. I know that scammers and other illegal activities do not follow DNC procedures, but this number is used only for emergency callers like doctors and hospitals and relatives all of which would leave VM. I called the number back and there was VM with prompts to be connected, also to DNC, and to leave VM msg re market practices, and also to have them report themselves (oh yeah, right) to regulatory agencies.
Didn't answer but read what others said. Blocked this number accordingly. Scam for student loan debt forgiveness. Definitely not legitimate as I know the status of mine and have been in touch with loan servicer.