IP that resolves to other IP

Hello, I hope you can help me or point me in the right direction.

We have several IoT devices on the field which comunicate via LTE to a given server IP, changing the server IP on the devices comes with the risk of losing remote access to the IoT devices, so we rather keep this IP fixed, but at the same time we want to have the ability to change which server gets this communication. This looks like a Domain DNS, but the IoT devices only accept IPs.

So... I need to get a fixed IP address that resolves to another IP address (EC2 instance) which I can change on the fly.

Thanks guys