Can I use BYOIP (Bring Your Own IP) in different regions?

Question

If I have an IPv4 /24 address block, and I use it (transfer it) to AWS, can it apply to different regions simultaneously? A simplified example: one ip address (of the supplied block) used in the Oregon data center (region) and another used in the Virginia data center (region)? I want to have redundant EC2 services in different geographic locations in case of natural disasters, among other reasons. I also want them running simultaneously, not fail-over. I am wondering if I need multiple /24 blocks, one for each data center (region), or if one will suffice.

Thanks

Answer

No, you can't do that with a single /24 block. Each individual /24 is bound to a region. As you suggest, to operate in multiple regions you will need a /24 range per region.

Answer

For provisioning as well as advertising your BYOIP you must provide a region

`aws ec2 advertise-byoip-cidr --cidr address-range --region us-east-1`

Refer to the below note from [this link](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-byoip.html)

**Important**

You must specify the AWS Region where the BYOIP range should be provisioned if it differs from your AWS CLI configuration `Default region name`

Another relevant notes form the same link

**Requirements and quotas**

* The most specific IPv4 address range that you can bring is /24.
* You can bring each address range to one Region at a time.

Can I use BYOIP (Bring Your Own IP) in different regions?

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