If there's no message and you never spoke to a caller, you don't know if the call is covered by the DNC registry, which would make complaints of that sort premature.
National Do Not Call Registry Q&A
http://www.consumer.ftc.gov/articles/0108-national-do-not-call-registry
Indiana cell phone
2014-02-21 10:54:17
Unknown
Called twice in 20 minutes and after 9pm EST.
No message.
Report them to Do Not Cal registry - https://www.donotcall.gov/
