What is Number phone 911515501 And 48 21074900?

I have a question is Phone Number 911515501 And 48 21074900.
– Who is the owner of the phone number.. They call me constantly every day at 2021-11-28 09:24:26

Can someone tell me what to do with 911515501 And 48 21074900 ?

9
Thank you very much
Recent, Review at 2021-11-28 09:24:26 by Member : How to block spam calls on Android Mobile