Didn't recognize the number so I didn't answer the phone. Caller didn't leave a message.

I do not know these people AND THEY ARE VERY VAGUE ON ANY INFORMATION THEY WILL GIVENE

Saying they are trying to collect a debt. No debt to collect..

If you KNOW you owe no money, or believe the call was from a fake debt collector, please take the time to read this:
http://www.consumer.ftc.gov/articles/0258-fake-debt-collectors

You can also block any repeated calls from the fake collectors.  See
http://phonehelp.2truth.com/
(That site also has a link to Amazon's phone blocker devices and apps, as well as a page showing various government sites that accept complaints or warn about scams.)

This number called my parent's house and told my Dad that they had important information about my social security number and that I needed to call them today!  My dad (elderly and thinking it must be important if it was about my social) gives them my number to call.  They left a message that I needed to call today, but said they were from DNR debt recovery services.  I don't have any past debts, so I knew this was fishy.  When I talked to my dad again, I asked him who they asked for, and they gave my previous married name, which was over 18 years ago!  Pretty sure my social security has been updated since then.  Made sure to tell my dad to NEVER give out my number or information and on himself either!!