Seeking Help I am getting calls from weird numbers

[iDJ]

Since 11 pm I am receiving calls multiple times from 2671764 and 6858179 on my Vodafone sim. Even the person from other end says Hello on receiving the call.
What kind of numbers are these? Should I call the cops?

 

[Hello17468]

I was the one who called you!

 

[Sumanth]

Block them in truecaller