ok this one was strange.
same number called at exact time on multiple lines.
the very same woman asked for different people as i answered each line WHILE the previously tranferred call was active.
=mind blown=

Caller ID says North Dakota, foreign speaking women asked for an individual listed on our company advertisement in the RMP Directory.  Then said she was with Hart Energy and wanted to speak to the person in charge of purchasing the directory.  If she truly was with Hart Energy, she would know who was in charge and would not be calling from North Dakota.  Not sure what their scam is but definetly a scam.

call all the time but won't leave a voicemail or call back number.
we don't do business with people we can't contact.

From the North Dakota Attorney General's page:  

CONSUMER ALERT - "MISSED CALL" CELL PHONE SCAM
If you missed a call on your cell phone from an out of state number, think twice before you hit redial. You may be the next target of the “missed call” scam, warns Attorney General Wayne Stenehjem. If you redial, you are connected to an international chat line or other premium pay-per-minute service. You are responsible for any charges, which are added to your phone bill.

OLD TELEPHONE SCAM USES NEW TRICK
March 3, 2014
Attorney General Wayne Stenehjem warned North Dakotans that an old telephone scam has resurfaced in North Dakota, but with a new twist; the scam artists are spoofing the real customer service number of a North Dakota bank.
For more information: Telephone Scam

The call was missed and I dialed the number back.  Didn't stay on more than 30 seconds because no one answered.  Only got background music. Assumed it was a scam to bill for line time.