Is the IP address fixed (static), or does it keep changing (dynamic)?

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Is the IP address fixed (static), or does it keep changing (dynamic)?

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Hi… By default, the egress (outgoing) IP address can change, but there’s an option for static, e.g., if you need to register it with an external API provider (as is the most common case):

https://fly.io/docs/networking/egress-ips/

In contrast, ingress is always fixed, and you should see the app’s particular public IP addresses listed in fly ips list.

https://fly.io/docs/networking/services/#anycast-ip-addresses

Hope this helps!