Reverse DNS Records

Create and Update PTR Records

Conexim DNS fully supports reverse DNS entries and provides several facilities to simplify management of both IPv4 and IPv6 reverse DNS.

Creating PTR Zone

Creating PTR Zone

In order to use Reverse DNS, you must ensure that the owner of the address space is able to delegate the subnet to Conexim’s DNS servers.

While it is possible to manually create .in-addr.arpa (IPv4) and ip6.arpa (IPv6) reverse DNS zones, Conexim DNS will create the appropriate zones simply by entering an IPv4 or IPv6 CIDR.



IPv4 Reverse DNS Schemas

For IPv4, reverse DNS delegations are typically performed on a /24 block, however smaller allocations can also be handled by Conexim DNS – either automatically, or manually.

If you enter an IPv4 subnet with a subnet size smaller than a /24, Conexim DNS will generate the DNS zone based on RFC 4183 notation.

RFC 2137 and DeGroot notation are fully supported if are manually entered.

IPv6 Reverse DNS

IPv6 Reverse DNS is fully supported with zones automatically created when you enter an IPv6 subnet in CIDR notation or create the .ip6.arpa zone manually.

Editing PTR Records

Editing PTR Records

Creating and Updating PTR Records

PTR records can be created manually within the reverse DNS zone, however they can also be created/updated when managing an A or AAAA record for a regular DNS zone.