shell:$ nslookup -timeout=2 -retry=1 'productforums.google.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
productforums.google.com	canonical name = groups.l.google.com.
Name:	groups.l.google.com
Address: 192.178.153.101
Name:	groups.l.google.com
Address: 192.178.153.138
Name:	groups.l.google.com
Address: 192.178.153.139
Name:	groups.l.google.com
Address: 192.178.153.102
Name:	groups.l.google.com
Address: 192.178.153.100
Name:	groups.l.google.com
Address: 192.178.153.113
Name:	groups.l.google.com
Address: 2607:f8b0:4023:1423::8b
Name:	groups.l.google.com
Address: 2607:f8b0:4023:1423::8a
Name:	groups.l.google.com
Address: 2607:f8b0:4023:1423::65
Name:	groups.l.google.com
Address: 2607:f8b0:4023:1423::64