How long do Dangling DNS entries for Api Management service, dangle for?

@Andre Santos

When a DNS entry becomes dangling, such as after deleting an API Management service, Azure reserves the DNS according to its policies. During this reservation period, only the original subscription or those linked to the same Microsoft Entra tenant can reclaim the DNS name. After the reservation ends, it becomes available for any subscription.

The reservation length varies:

1. Reservation Period: The original owner has exclusive rights to reclaim the DNS during this time. The cool-off period differs by subscription type:

   Enterprise subscriptions: about 180 days

   Non-enterprise: usually 7 days, sometimes up to 30 days

2. After Reservation: Any Azure subscription can claim the DNS once the period ends.

To make the best use of DNS space, it’s a good idea to remove unused DNS records promptly.

For more information, see this Microsoft document about dangling DNS entries and reservation policies.

Hope this helps !!