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Q. When registering PTR records in reverse zone, how should I describe Name? (IPv6 edition)

Write Name according to the following procedure.

  1. Convert the IP address into an unabbreviated form (hexadecimal notation).
    When the target IP address is "2001:db8:12:3400::5," change the expression form to "2001:0db8:0012:3400:0000:0000:0000:0005".
  2. Arrange the characters other than colons (:) in reverse order, and separate each character with a dot (.).
    For example, "2001:0db8:0012:3400:0000:0000:0000:0005" will be expressed as "5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.3.2.1.0.0.8.b.d.0.1.0.0.2".
  3. Add ".ip6.arpa." to the end.
    5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.3.2.1.0.0.8.b.d.0.1.0.0.2.ip6.arpa.
  4. Describe the string in step 3 in Name of the PTR record.

As described above, the following PTR record is registered.

PTR records to be registered
5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.3.2.1.0.0.8.b.d.0.1.0.0.2.ip6.arpa. IN PTR xxxxx.example.jp.