IPv6 Prefix Range Calculator

Calculate start and end boundary addresses and total address volume for any IPv6 prefix.

How It Works & Processing Standards

Calculate start and end boundary addresses and total address volume for any IPv6 prefix.

Your input data is never sent to any server and is securely processed on your device.

Current Limits

  • Maximum input length: 100,000 characters

IPv6 Prefix Range Calculator is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use IPv6 Prefix Range Calculator

  1. 1
    Enter IPv6 PrefixProvide an IPv6 CIDR prefix (e.g. 2001:db8:1234::/48).
  2. 2
    Inspect LimitsCopy start address, end address, and total capacity.

Common Use Cases

  • Verifying ISP IPv6 prefix assignment boundaries and data center route filters
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