shell:$ nslookup -timeout=2 -retry=1 'web.eldjazair.dz'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	web.eldjazair.dz
Address: 193.194.90.64
;; communications error to 75.98.161.224#53: timed out