shell:$ nslookup -timeout=2 -retry=1 'api.bd.airtel.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
api.bd.airtel.com	canonical name = bd.airtel.com.
Name:	bd.airtel.com
Address: 202.134.12.146