The following features of internal ranges are available in Preview

## Feature The following features of internal ranges are available in **Preview**: * Reserving internal ranges with IPv6 addresses * Creating immutable internal ranges (ranges that can't be updated, except for the description) * Editable descriptions For more information, see [Internal ranges overview](https://cloud.google.com/vpc/docs/internal-ranges). ## Feature You can exclude IP address ranges from internal range automatic IP address allocation. This feature is available in **Preview**. For more information, see [Reserve internal ranges](https://cloud.google.com/vpc/docs/create-use-internal-ranges#create-internal-ranges). ## Feature You can create internal ranges that overlap with routes and subnets. This feature is available in **General Availability**. For more information, see [Internal ranges overview](https://cloud.google.com/vpc/docs/internal-ranges).