...
nslookup -q=TXT _cloud-netblocks3.googleusercontent.com 8.8.8.8
107.167.160.0/19
107.178.192.0/18
146.148.2.0/23
146.148.4.0/22
146.148.8.0/21
146.148.16.0/20
146.148.32.0/19
146.148.64.0/18
130.211.4.0/22
35.203.0.0/17
35.203.128.0/18
35.203.240.0/20
nslookup -q=TXT _cloud-netblocks4.googleusercontent.com 8.8.8.8
130.211.8.0/21
130.211.16.0/20
130.211.32.0/19
130.211.64.0/18
130.211.128.0/17
104.154.0.0/15
104.196.0.0/14
208.68.108.0/23
35.184.0.0/14
35.188.0.0/15
35.206.64.0/18
35.202.0.0/16
nslookup -q=TXT _cloud-netblocks5.googleusercontent.com 8.8.8.8
35.190.0.0/17
35.190.128.0/18
35.190.192.0/19
35.190.224.0/20
35.192.0.0/14
35.196.0.0/15
35.198.0.0/16
35.199.0.0/17
35.199.128.0/18
35.200.0.0/15
IPv6 blocks
nslookup -q=TXT _netblocks2.google.com 8.8.8.8
...