IP Tools

IPv6 Range to CIDR

A companion page for folding IPv6 ranges back into CIDR notation.

IP Tools Browser shell DNSChecker inspired

What this page covers

IPv6 Range to CIDR makes prefix calculations easier to discover inside the same IP tool family.

  • Useful for prefix summarization.
  • Pairs naturally with the CIDR-to-range page.
  • Keeps the IPv6 workflow easy to navigate.

Why this fits the site

These DNSChecker-inspired pages keep the same header, footer, and card-based rhythm as the rest of MastreTools, so the new sections blend into the existing navigation instead of feeling bolted on.

How users reach it 
Search in the menu or open ipv6-range-to-cidr.html directly from the header.

Notes

Browser-only pages are a good fit for lookups, conversions, and guidance. This page now performs a real IPv6 range-to-CIDR conversion and uses the secondary input to control how CIDR blocks are displayed.

Convert IPv6 range to CIDR

Enter an IPv6 start and end range separated by a dash. The secondary input controls the CIDR display style so the output can stay compact or fully expanded.

Compressed keeps the CIDRs easy to scan, while expanded shows every hextet for audit-friendly output.

Ready to convert an IPv6 range.

No conversion has been run yet.

Text report

This summary is useful when you want a plain-text copy of the calculated CIDR blocks.