shell:$ nslookup -timeout=2 -retry=1 'sl.airtel.com'
;; communications error to 1.1.1.1#53: timed out
Server:		8.8.8.8
Address:	8.8.8.8#53

Non-authoritative answer:
Name:	sl.airtel.com
Address: 184.106.133.166
;; communications error to 1.1.1.1#53: timed out