The University of Texas at Austin

Domain Name Hosting and Registration

Using Standard Format for DNS Requests

The IP address and domain name request should include the following information and follow a standard format (using a semicolon";" for descriptions and tabs instead of spaces in all but the first line). You can copy and paste this example into your email message to UTnic.

See Choosing a Host Name for guidelines for naming your computers. See UTnic's DNS Naming Conventions for specific requirements for name selection at the University.

$ORIGIN sub-domain-name.utexas.edu.
; Name-of-contact-person telephone office-location e-mail-address
computer-name   IN  A   net-address ; computer-location

Standard Format Example

An IP address request for each of several computers associated with the cm.utexas.edu domain at the WCH buildings might look like this:

$ORIGIN cm.utexas.edu.

; Responsible-Person 475-9400 WCH 1.114 r.person@mail.utexas.edu
poblano        IN      A        128.83.134.?       ; WCH 1.104
serrano        IN      A        128.83.134.?       ; WCH 1.114
chile-verde    IN      A        128.83.134.?       ; WCH 1.116

Requested Information Details

  • $ORIGIN: the existing subdomain assigned or being hosting for your department.

  • Name of Contact Person: usually the technical support coordinator for the department.

  • Telephone: telephone number where the contact person can be located.

  • Office Location: building and room number of the contact person.

  • E-mail Address: email address of the contact person for verification/updates/alerts.

  • Computer Name: the name you want assigned to your device (see Choosing a Host Name).

  • Network Address (A): the IP address assignment or range for your area.

  • Computer Location: building and room number where computer is located.

Canonical Names (CNAMEs) and Mail eXchanger (MX) Records

Besides the A (Address) resource record, there are several others. The most common ones are:

  • Canonical Name (CNAME) - used for creating alias names (in place of A).

  • Mail eXchanger (MX) - identifies a machine that is designated to receive email in place of another machine (in place of A).

CNAME Example: green-chile is an alias for chile-verde:

$ORIGIN cm.utexas.edu.
; Responsible-Person 475-9400 WCH 1.114 r.person@mail.utexas.edu
green-chile     IN    CNAME     chile-verde

MX Example: In the example below, poblano mail is redirected to mailhost machine (the number 10 is a preference number that allows the use and ranking of multiple mail processor machines):

poblano         IN    MX 10     mailhost

Using the $ORIGIN Statement

In any of the above examples, the $ORIGIN statement can be excluded if a Fully Qualified Domain Name is substituted for the computer name (e.g., poblano.cm.utexas.edu. instead of only poblano). The MX resource record example above can be rewritten as:

; Responsible-Person 475-9400 WCH 1.114 r.person@mail.utexas.edu
poblano.cm.utexas.edu.   IN    MX 10     mailhost.cm.utexas.edu.

A fully qualified domain name (FQDN) is a domain name that extends all the way back to root. It must include the root "." at the end of the name to be consider a FQDN (e.g., "tn.utexas.edu." not "tn.utexas.edu"). See Understanding How Domain Names Work for more information.

Last updated December 12, 2012 @ 2:57 pm

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