If you are filtering traffic and need the list of IPs that Backup Radar communicates from they are listed below:
US Hosted Partners
Effective July 13 2023
20.98.189.147
20.106.27.138
20.157.88.41
35.162.64.210
Prior to July 13 2023
13.86.38.212
13.86.39.43
13.86.62.220
13.86.62.224
13.86.62.234
13.86.63.92
13.86.63.124
13.86.63.190
13.89.42.167
13.89.42.245
13.89.43.229
13.89.105.11
13.89.112.174
13.89.113.247
13.89.115.189
13.89.115.253
13.89.116.25
13.89.116.109
13.89.118.252
13.89.172.17
20.40.202.2
20.40.202.3
20.40.202.11
20.84.169.111
20.84.169.115
20.84.169.129
20.84.169.148
20.84.169.163
20.84.169.172
20.84.200.65
20.84.200.117
20.84.200.146
20.84.200.167
20.84.200.172
20.84.200.177
23.101.116.190
23.101.118.145
23.101.125.77
23.101.125.157
23.101.126.141
35.162.64.210
52.141.217.144
52.141.217.151
52.141.217.163
52.141.217.248
52.141.219.48
52.141.219.233
52.143.247.236
52.143.247.253
52.143.255.30
52.143.255.44
52.143.255.72
52.143.255.112
52.154.158.226
52.154.159.109
52.154.159.179
52.154.159.187
52.154.159.238
52.154.168.165
52.154.200.26
52.154.201.44
52.154.201.172
52.154.202.224
52.154.203.5
52.154.203.36
52.154.204.255
52.154.205.13
52.154.205.102
52.154.205.194
52.154.205.215
52.154.205.231
52.154.206.152
52.154.207.32
52.154.243.144
52.154.243.170
52.154.243.184
52.154.243.213
52.154.244.23
52.154.244.169
52.154.244.221
52.154.244.240
52.154.245.2
52.154.245.48
52.154.245.103
52.154.245.121
104.43.205.22
168.61.211.95
EU Hosted Partners
Effective July 13 2023
20.103.29.139
20.23.157.229
20.157.115.40
35.162.64.210
Prior to July 13 2023
13.69.68.1
20.31.44.37
20.31.45.71
20.31.45.147
20.31.46.248
20.31.47.16
20.31.47.229
20.31.47.230
20.31.47.231
20.31.47.233
20.31.47.234
20.31.47.236
20.31.47.239
20.31.47.252
20.50.2.11
20.50.2.25
20.50.222.107
20.50.229.157
20.54.179.176
20.54.179.185
20.54.179.189
20.54.179.193
20.54.179.220
20.54.179.227
20.54.179.240
20.54.180.8
20.54.180.14
20.54.180.20
20.54.180.67
20.71.74.37
20.71.74.40
20.71.74.43
20.71.74.67
20.71.74.78
20.71.74.89
20.71.74.95
20.71.74.129
20.71.74.148
20.71.74.181
20.71.74.220
20.71.74.237
20.71.74.243
20.71.75.43
20.71.75.50
20.71.75.82
20.71.75.86
20.71.75.95
20.76.215.81
20.93.170.242
20.93.173.184
20.93.173.228
20.93.173.241
20.93.174.4
20.93.174.7
20.105.232.15
20.238.240.107
20.238.240.108
20.238.240.148
20.238.240.152
20.238.240.213
20.238.240.221
20.238.240.223
20.238.240.233
20.238.240.235
20.238.240.239
35.162.64.210
40.114.184.22
40.114.184.106
40.114.184.110
40.114.186.111
40.115.59.104
51.105.226.174
51.136.74.99
52.143.9.209
52.143.11.118
52.143.12.244
52.143.14.39
52.143.15.188
104.47.142.248
104.47.143.150
104.47.144.212
104.47.161.32
104.47.161.68
104.47.161.137