Source IPs for NUKI webhooks

Nuki APIs
1

Is there a list of all source IPs from which NUKI webhooks can be sent? Ideally I want to only allow traffic in the firewall from those IPs.

So far I noticed the following:
82.165.102.189
82.165.163.105
82.165.251.107

Are there more addresses in use or can I allow only these 3?

Thanks