Hi Joshua,
We don’t have fixed IP addresses for https://sonarcloud.io itself. IP addresses you were able to dig may change over time with workload and recycling of underlying resources: we do not guarantee permanent IP addresses. As you could see from our documentation, we will also drop support for webhooks fixed IPs shortly. This is in my opinion a trend you should observe from most other online service providers.
Out of curiosity, why would you block all outgoing network traffic to Germany and Ireland?
Regards,
Alex