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Thread: Non-registered domains

  1. #1

    Non-registered domains

    I seem to remember many years ago that there was a subdomain set up for private use, very much like the IP of 10.*.*.* or 192.168.*.* is reserved for private networks. I thought the sub-domain of local was for this purpose, but I have not been able to find anything to support this or any old RFCs discussing this.



    Hey, I was born confused,what's your excuse?

  2. #2

    From RFC 2606:

    2. TLDs for Testing, & Documentation Examples

    There is a need for top level domain (TLD) names that can be used for
    creating names which, without fear of conflicts with current or
    future actual TLD names in the global DNS, can be used for private
    testing of existing DNS related code, examples in documentation, DNS
    related experimentation, invalid DNS names, or other similar uses.

    For example, without guidance, a site might set up some local
    additional unused top level domains for testing of its local DNS code
    and configuration. Later, these TLDs might come into actual use on
    the global Internet. As a result, local attempts to reference the
    real data in these zones could be thwarted by the local test
    versions. Or test or example code might be written that accesses a
    TLD that is in use with the thought that the test code would only be
    run in a restricted testbed net or the example never actually run.
    Later, the test code could escape from the testbed or the example be
    actually coded and run on the Internet. Depending on the nature of
    the test or example, it might be best for it to be referencing a TLD
    permanently reserved for such purposes.

    To safely satisfy these needs, four domain names are reserved as
    listed and described below.


    ".test" is recommended for use in testing of current or new DNS
    related code.

    ".example" is recommended for use in documentation or as examples.

    ".invalid" is intended for use in online construction of domain
    names that are sure to be invalid and which it is obvious at a
    glance are invalid.

    The ".localhost" TLD has traditionally been statically defined in
    host DNS implementations as having an A record pointing to the
    loop back IP address and is reserved for such use. Any other use
    would conflict with widely deployed code which assumes this use.

    3. Reserved Example Second Level Domain Names

    The Internet Assigned Numbers Authority (IANA) also currently has the
    following second level domain names reserved which can be used as
    Hope this helps.

  3. #3
    So if I'm understanding this right then by using either .test or .example or .invalid that the DNS software would recognize this as a "private LAN" and not as a registered domain name?

  4. #4
    Potentially. The real answer is "it depends." In all likelihood you'll have to tell it about these rather than expecting it to just know.

  5. #5
    you can check it before......

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