Who called from 7782828001

Same number called 2 days in a row, didn't answer either. No voice msg on first call but 8 seconds of background noise can be heard. No msg second time. Suspicious call.

Just received call on my home line. No message left. I did not answer the initial call.

I am receiving a call from this number for a week.  Twice yesterday.  Rings 4 times, when I answer nobody is there and I can hear a background noise and hang up.