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BanlistMask = deny 66.249.64.0/19, deny 72.14.192.0/18, deny 100.43.64.0/19, deny 199.21.96.0/22, deny 5.255.192.0/18, deny 95.108.128.0/17, deny 77.88.0.0/18, deny 87.250.224.0/19, deny 93.158.128.0/18, deny 178.154.128.0/17, deny 213.180.192.0/19, deny 37.140.141.0/24, deny 141.8.147.0/24, deny 5.45.192.0/18, deny 157.60.0.0/16, deny 157.56.0.0/14, deny 157.54.0.0/15, deny 157.55.0.0/16, deny 157.57.0.0/16, deny 157.58.0.0/16, deny 157.59.0.0/16, deny 131.253.32.0/20, deny 131.253.24.0/21, deny 131.253.22.0/23, deny 131.253.21.0/24, deny 65.52.0.0/14, deny 207.46.0.0/16, deny 77.75.76.0/23, deny 94.100.176.0/20, deny 217.69.128.0/20, deny 123.125.71.0/24, deny 180.76.0.0/16, deny 220.181.0.0/16, deny 185.10.104.0/22, deny 119.63.192.0/21, deny 82.145.208.0/20, deny 185.26.180.0/22, deny 37.228.104.0/21, deny 141.0.8.0/21, deny 107.167.96.0/21, deny 68.180.128.0/17, deny 192.168.0.0/24, deny 127.0.0.1

Maybe it could be useful. This string includes,

google ip ranges

66.249.64.0/19
72.14.192.0/18

bing ip ranges

157.60.0.0/16
157.59.0.0/16
157.58.0.0/16
157.57.0.0/16
157.56.0.0/14
157.54.0.0/15
157.55.0.0/16
131.253.32.0/20
131.253.24.0/21
131.253.22.0/23
131.253.21.0/24
65.52.0.0/14
207.46.0.0/16

yahoo ip ranges

68.180.128.0/17

yandex ip ranges

100.43.64.0/19
199.21.96.0/22
5.255.192.0/18
95.108.128.0/17
77.88.0.0/18
87.250.224.0/19
93.158.128.0/18
178.154.128.0/17
213.180.192.0/19
37.140.141.0/24
141.8.147.0/24
5.45.192.0/18

baidu ip ranges

123.125.71.0/24
180.76.0.0/16
220.181.0.0/16
185.10.104.0/22
119.63.192.0/21

seznam ip ranges

77.75.76.0/23

mail.ru ip ranges

217.69.128.0/20
94.100.176.0/20


opera ip ranges
Note, that Opera Mini gives its own IP address.
If you have some mobile visitors they will be banned without this subnets.
Because they can use same IP address by Opera Mini

82.145.208.0/20
185.26.180.0/22
37.228.104.0/21
141.0.8.0/21
107.167.96.0/21