Which IP addresses should I allow for the Number Insight Advanced Async API?

If you are restricting inbound traffic to your organisation, in order to use the Number Insight Advanced Async API callbacks, you must allow the following subnets:

• 216.147.0.0/18
• 18.142.194.141
• 52.76.141.214
• 18.143.121.191
• 52.63.252.135
• 13.54.58.250
• 13.55.214.24
• 52.28.228.91
• 3.124.175.57
• 18.193.249.39
• 52.210.189.138
• 34.253.97.63
• 52.48.170.6
• 44.216.130.96
• 3.91.131.112
• 52.55.27.244
• 35.82.65.223
• 44.225.123.134
• 44.228.216.70