shell:$ nslookup -timeout=2 -retry=1 'i-speed.vn'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	i-speed.vn
Address: 117.122.125.83
Name:	i-speed.vn
Address: 2001:dc8:c001:2::83