shell:$ nslookup -timeout=2 -retry=1 'www.rtb.bf' Server: 1.1.1.1 Address: 1.1.1.1#53 Non-authoritative answer: Name: www.rtb.bf Address: 213.186.33.4 Name: www.rtb.bf Address: 2001:41d0:1:1b00:213:186:33:4