2 rings any time of day or night.

I have received more than a dozen calls from this number and 7628 and 7627 at all times of the day or night. They either hang up as soon as you answer or only let it ring twice. I finally had my phone company block them.

I would prefer to find out who it is. I would like to pay them a personal visit and demonstrate in a way everyone could understand, how much I dislike receiving their disturbing and aggravating calls.

I've been experiencing the same kind of calls from 508-992-7628 and 508-992-7629.  Found this info on switchboard.com.  
L Stonge
117 Jouvette St
New Bedford, MA 02744
508-992-7628
I filed a police report this afternoon with the New Bedford Police Dept.  Please call this number and file a report.  If we all do this, hopefully, we can get this stopped!  Police Dept phone number is (508) 991-6340

Be sure to register your number on the National Do-Not-Call list.
https://www.donotcall.gov/
I just started to receive these calls on a one of my 800 lines that I forgot to register. I received 72 calls from them in the last 30 days, but most were at night when no one was here at work. I've registered it now, hopefully it'll stop in 30 days.