...
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
35.204.0.0/15
35.235.216.0/21
...
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
35.204.0.0/15
35.235.216.0/21