Who called from 2023406861

Robocall from a robovoice telling me I owe money to the department of the internal revenue service. SCAM.

Voicemail,  ot full mesage, just a threatening voice on the urgency to return the call.

It's the IRS scam.  Block it and forget it.  Here's some info:
https://www.irs.gov/uac/newsroom/irs-repeats-warning-about-phone-scams
http://www.forbes.com/sites/johnwasik/2016/06 ... u/#6cb8a18e171f
https://www.pindropsecurity.com/irs-phone-scam-live-call_analysis/
http://money.cnn.com/2016/05/25/news/irs-impersonators-scam/