In my case, a mature lady said she was calling me "on behalf of Openroad Hyundai".  She reminded me of oil change, and made an appointment for the service of my car.  It seems that they are a call center who call customers for car dealers mostly.

this number calls me once a month excatly every 3rd saturday of the month and always around 6pm
I dont bother to pick up

When it calls me the line is dead and no one is there. When I call back it says the number you have called is not assigned. What???

Got a call from this number, my call display shows it is from INSPYRE SOLUTN

Just received 2 calls from this number today and on the 2nd call there was a message saying there were calling from Mazda. Wanting to remind me of my next service?