Enter an IPv6 address and prefix, such as 2001:db8:abcd:12::42/64, to inspect the canonical notation and network boundaries.
Calculated locally in your browser. Supports full or shortened IPv6 notation and prefixes /0 to /128. IPv6 has no broadcast address.
The prefix specifies how many of the 128 bits belong to the network. Remaining bits are set to zero for the first address and one for the last. IPv6 has no broadcast address. Canonical text formatting follows RFC 5952: lowercase hex, no leading zeroes and at most one :: shortening of the longest zero run. The architecture is documented in RFC 4291. The result helps with planning and does not verify router rules.
A /64 prefix means the first 64 bits identify the network prefix and the remaining 64 bits identify the interface or an address within that block.
No. IPv6 has no broadcast address. The calculator shows the first and last addresses of the block, not a broadcast address.
A /64 contains 2^64, or 18,446,744,073,709,551,616 addresses. Not all of them need to be assigned to devices.
Leading zeroes within a group are omitted, and the longest run of all-zero groups is replaced once with ::. The calculator uses canonical RFC 5952 notation.
No. Parsing and calculation run entirely in your browser.
