Add more info about IPv6 ranges

Author: leslitagordita

openapi.yaml

@@ -9048,9 +9048,14 @@ paths:
       - Networking
       summary: List IPv6 Ranges
       description: >
-        Displays the IPv6 ranges on your Account. A range of IPv6 addresses is routed to a single
-        Linode in a given [Region](https://developers.linode.com/api/v4/regions). Your Linode is responsible for routing individual addresses in
-        the range, or handling traffic for all the addresses in the range.
+        Displays the IPv6 ranges on your Account.
+
+
+          * An IPv6 range is a `/64` block of IPv6 addresses routed to a single Linode in a given [Region](https://developers.linode.com/api/v4/regions).
+
+          * Your Linode is responsible for routing individual addresses in the range, or handling traffic for all the addresses in the range.
+
+          * You must [open a support ticket](/api/v4/support-tickets/#post) to request a `/64` block of IPv6 addresses to be added to your account.
       operationId: getIPv6Ranges
       x-linode-cli-action: v6-ranges
       security: