Hey Jan, thanks for checking in and welcome (or welcome back!) to the Streamlit community! 
You’re right to double-check—IP allowlisting is a common need for database and API integrations.
As of the latest official documentation, the current list of Streamlit Community Cloud outbound IP addresses is:
- 35.230.127.150
- 35.203.151.101
- 34.19.100.134
- 34.83.176.217
- 35.230.58.211
- 35.203.187.165
- 35.185.209.55
- 34.127.88.74
- 34.127.0.121
- 35.230.78.192
- 35.247.110.67
- 35.197.92.111
- 34.168.247.159
- 35.230.56.30
- 34.127.33.101
- 35.227.190.87
- 35.199.156.97
- 34.82.135.155
Please note: these IPs may change at any time without notice, so it’s best to monitor the official status page for updates. Community Cloud is designed for public sharing, so all apps use these IPs, and the list is extended occasionally as the platform grows. For the most up-to-date info, always refer to the Streamlit Docs and related forum threads.
Sources: