shell:$ nslookup -timeout=2 -retry=1 'debian.pool.ntp.org'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	debian.pool.ntp.org
Address: 172.234.25.10
Name:	debian.pool.ntp.org
Address: 69.164.213.136
Name:	debian.pool.ntp.org
Address: 24.249.17.250
Name:	debian.pool.ntp.org
Address: 162.159.200.1