How to: Create a PTR Record

A PTR record, also referred to as a Reverse IP record, is an "A" record in reverse. In the case of an "A" record, DNS lists a Fully Qualified Domain such as www.foo.com and points it to an IP address. A PTR record lists an IP address and points it to a Fully Qualified Domain such as www.foo.com.

Unlike domain names, IP space used by TWC is owned by TWC. TWC assigns the customer the right to use certain blocks of space, which are assigned during the account creation process. The customer may choose DNS service providers, including TWC, a third-party DNS service provider, or the customer may manage their own DNS services. IP addresses, however, may only be managed by the owner of the IP space, which is TWC.

In order to enter PTR records into the TWC DNS server, the IP space must be TWC Commercial owned IP space. This means that it is the IP space is assigned to the customer by TWC for their use only.

1. Login to the DNS and E-mail Administrative Interface tool via a Web browser.
2. Use the Select context drop-down menu to select a DNS zone.
3. Click Create in the Main Menu Bar (the orange bar).
4. Click DNS Record in the sub-menu bar (the blue bar) to open the Create DNS Record form.
5. Starting from a blank Create DNS Record form, select the PTR radio button.
   
   Note: The field names on the form change to reflect the naming convention for PTR records. The PTR record field names are IP Address, Host Name, and TTL.
   
   
   
6. Enter the IP Address in the IP Address field.
7. Enter the corresponding host name in the Host Name field.
8. Click the Create button to submit the record for creation.
   
   
9. The Interface tool will display a PTR record created message. To view PTR records you will need to use the List feature. The PTR record will not list in the table displayed.