got a call at 1:55pm today but at 4:30 the phone is no longer in service. comes up private number

Got a call from this number when I answered it rang them back so I know it was a telemarketer. They called my cell phone. Don't know who they are I couldn't understand the person that called do to an heavy accent. I told them never to call my number again.

unreturnable

came up "private line" on caller id, the number was 314-801-0011. left ne message and no one was there when i tried to return the call. I am on the do not call list. When researched it said that the call came from Ladue. I know that means nothing but it also showed the location, according to Yahoo maps to be close to some golf course there as well.

We got 2 different calls from this number.  First time was a hang up.  Second time we were told to "enter your card number".