shell:$ nslookup -timeout=2 -retry=1 'apps.airtel.lk'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
apps.airtel.lk	canonical name = airtel.nexva.mobi.
airtel.nexva.mobi	canonical name = careerseducations.net.
Name:	careerseducations.net
Address: 66.181.34.94