Trying to find out who owns this phone number.

I just received a call from this number,

312 - Do you take credit cards there?
Eric - I'm sorry, who is this?
312 - This is John, from Blue Pay. I was wondering if you take credit cards?
Eric - Umm... take credit cards where... ?
312 - <click, hang up>

Blue Pay seems to be a credit card processing service,
http://www.bluepay.com/

This is my cell phone, and I'm on the national Do Not Call registry. I'm going over to register a complaint now.
https://complaints.donotcall.gov

I'll also be filing a complaint with the Better Business Bureau,
https://www.bbb.org/consumer-complaints/file-a-complaint/get-started

When I answered the phone they said Hi then hung up? Ugh.

I just got the exact same type of call as Eric. I, too, am filing complaints.

This company is an arm of Wells Fargo, hence the total lack of oversight.