A Reverse Address (PTR) record specifies a host name for a reverse IP-address-to-host mapping.
Site Administrators acting as Server Administrators for their own domains will need to contact their service provider to find out if in-addr.arpa zones have been delegated to their control. If they have not, they can create PTR records, but they will have no effect. They will need to submit any in-addr.arpa changes to their service provider for the changes to take effect.
You can add the record only if your service provider has enabled the capability in the DNS policy file. If not enabled, the control panel displays a message stating that the policy settings do not allow you to add the zone record. Contact your service provider if you want the settings changed.
To add a PTR record:
Note: If you do not want to create a Host (A) record now, you can manually add a Host (A) record for the forward lookup later.