...
nslookup -q=TXT _netblocks.google.com 8.8.8.8
35.190.247.0/24
64.233.160.0/19
66.102.0.0/20
66.249.80.0/20
72.14.192.0/18
74.125.0.0/16
108.177.8.0/21
173.194.0.0/16
209.85.128.0/17
216.58.192.0/19
216.239.32.0/19
nslookup -q=TXT _netblocks3.google.com 8.8.8.8
172.217.0.0/19
172.217.32.0/20
172.217.128.0/19
172.217.160.0/20
172.217.192.0/19
172.253.56.0/21
172.253.112.0/20
108.177.96.0/19
35.191.0.0/16
130.211.0.0/22
nslookup -q=TXT _cloud-netblocks1.googleusercontent.com 8.8.8.8
8.34.208.0/20
8.35.192.0/21
8.35.200.0/23108
23.59236.8048.0/20
108.170.192
23.251.128.0/19
34.64.0.0/2011108
34.17096.2080.0/2114
nslookup -q=TXT _cloud-netblocks2.googleusercontent.com 8.8.8.8162.216.148
34.100.0.0/16
34.102.0.0/2215
16234.222104.1760.0/2114173
34.255124.1120.0/2018192
34.158124.2864.0/2220199
34.192124.11280.0/2223199
34.223124.23284.0/22199
34.223124.23688.0/2323
34.236124.4892.0/202223
34.251125.1280.0/1916
35.204184.0.0/14
35.188.0.0/15
35.208190.0.0/1317
nslookup -q=TXT _cloud-netblocks3.googleusercontent.com 8.8.8.8
10735.167190.160128.0/1918
10735.178190.192.0/1819146
35.148190.2224.0/2320
14635.148190.4240.0/22
14635.148192.80.0/2114
14635.148196.160.0/2015146
35.148198.320.0/1916
14635.148199.640.0/1817
35.203199.0128.0/1718
35.203200.1280.0/1813
35.203208.1920.0/1913
35.203216.2400.0/2015
nslookup -q=TXT _cloud-netblocks4.googleusercontent.com 8.8.8.8
13035.211219.8192.0/2124
13035.211220.160.0/2014130
35.211224.320.0/1913
13035.211232.640.0/1815130
35.211234.1280.0/1716
10435.154235.0.0/1517104
35.235.196192.0/20
35.235.216.0/1421208
35.68235.108224.0/2320
35.184236.0.0/14
35.188240.0.0/1513
35104.216154.1280.0/1715
35104.217196.1280.0/1714
nslookup -q=TXT _cloud-netblocks5.googleusercontent.com 8.8.8.8
35107.190167.0160.0/171935
107.190178.128192.0/1835
108.19059.19280.0/1920
35108.235170.224192.0/2035
108.170.192208.0/21
108.170.216.0/142235
108.196170.0220.0/152335
108.198170.0222.0/162435
130.199211.04.0/172235
130.199211.1288.0/182135
130.200211.016.0/152035
130.235211.21632.0/2119
nslookup -q=TXT _cloud-netblocks6.googleusercontent.com 8.8.8.8
35130.190211.22464.0/2018
35130.232211.0128.0/151735
146.234148.02.0/1623
35146.235148.04.0/172235
146.235148.1928.0/2021
35146.236148.016.0/142035
146.240148.032.0/151935
146.203148.23264.0/2118130
162.211216.4148.0/2235
162.220222.0176.0/142135
173.242255.0112.0/1520
35192.244158.028.0/1422
nslookup -q=TXT _cloud-netblocks7.googleusercontent.com 8.8.8.8
34199.64192.0112.0/112234
199.96223.0232.0/15
108.170.216.0/22108
199.170223.220236.0/23
108208.170.222.0/24
35.22468.108.0.0/13
35.202.0.0/16
35.190.240.0/22
35.190.242.0/23
35.206.0.0/15
IPv6 Blocks
nslookup -q=TXT _netblocks2.google.com 8.8.8.8
2001:4860:4000::/36
2404:6800:4000::/36
2607:f8b0:4000::/36
2800:3f0:4000::/36
2a00:1450:4000::/36
2c0f:fb50:4000::/36