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.
To add a PTR record:
 . The Record List form opens. It displays all existing records for the zone.
. The Record List form opens. It displays all existing records for the zone.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.