Airtel
Eceived unknown call from 381

I jst now received a call from a numebr 381 i was shcoked to see the number but i though it would be a call frm airtel customer care

help me out coz whn i received the call no one was there to reply me nd andter 2-3 secs call got dissconnected

now what should i do?

technically i knw tht is possible but am i required to file an complaint in this case?