Sample ips for dns are as below:
(They are other ranges that are open now, scan and find out )

102.133.160.77
102.133.139.154
102.133.235.79
102.133.128.244
102.22.82.129
102.22.81.212
102.22.82.17
102.22.81.249
102.22.27.125
102.22.82.53
102.22.83.78
102.22.81.20
102.22.81.195
102.22.83.114
102.22.83.149
102.22.83.72
102.22.81.122
102.22.83.102
102.22.195.246
102.22.108.25
102.22.81.37
102.22.80.182
102.22.81.140
102.22.83.155
102.22.82.5
102.22.82.45
102.22.82.94
102.22.82.242
102.23.163.244
102.23.226.71
102.23.226.70
102.37.158.250
102.37.142.149