IPv6 Reverse DNS Generator
Generate ip6.arpa PTR owners, reverse zones, and a BIND snippet
Generates names and BIND text only; it never queries DNS.
About this tool
IPv6 Reverse DNS Generator expands an IPv6 address into its 32-nibble reversed owner name and derives the containing ip6.arpa zone for a nibble-aligned prefix such as /32, /48, or /64. It returns a normalized address and a BIND-style PTR snippet with an example target that you must replace. Non-nibble prefixes are rejected because standard IPv6 reverse zones delegate on hexadecimal nibble boundaries. The tool only generates names; it never queries or publishes DNS records.
Scenario Recipes
Prepare a delegated IPv6 PTR zone
Goal: Avoid manual nibble reversal when writing a DNS change
- Enter the allocated IPv6 prefix or host address.
- Confirm the nibble-aligned reverse zone and owner name.
- Replace the example PTR target, then submit the reviewed BIND text through the approved DNS workflow.
Result: A reviewable ip6.arpa owner and zone snippet.
Frequently Asked Questions
Why are IPv6 labels reversed one hexadecimal nibble at a time?
The ip6.arpa convention represents the 128-bit address as 32 reversed hexadecimal nibbles.
Which prefixes can become a reverse zone?
Standard delegated zones use nibble-aligned prefixes divisible by four, such as /32, /48, /64, and /128.
Does the generated PTR target resolve?
No. The target is an example placeholder and must be replaced with your real fully qualified domain name.
Can the tool publish DNS records?
No. It only generates owner names and text for review.
Does it support IPv4?
No. Use an IPv4-specific reverse DNS workflow for in-addr.arpa names.
Is DNS queried?
No. Address parsing and name generation are entirely local.
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