Who called from 2402920071

They called, I answered and heard some mumbling, then they just hung up. I tried calling back, but there was an issue

Don't pick up or speak to them. Telemarketing.

Got a call from (240) 292-0071. Person left not message by voice or text. Must assumed it was a prank. Who calls and does not leave a message?

Tuesday, 14 February 2017 at 4:25 PM, Central Time. Received call. Display screen showed the call was from an Unknown Caller at 1-240-292-0071. I do not answer calls from unidentified callers. Ignored it. No message left by the caller.

Tuesday-14 February 2017 at 5:19 PM, Central Time. Received call. Again, display screen showed the call was from an Unknown Caller at 1-240-292-0071. I do not answer calls from unidentified callers. Ignored it. No message left by the caller.