Enter an IPv6 address or prefix and a prefix length to get the network address in full and compressed notation, the number of addresses in the block, and how many /64 subnets it holds.
IPv6 blocks are enormous and the notation is unfamiliar. Enter an IPv6 address and a prefix length and this tool expands it to full form, compresses it to short form, and tells you how many addresses and how many standard /64 subnets the block holds.
Our IPv6 transition guide covers APNIC allocation, dual-stack versus 464XLAT, CPE compatibility, and a sensible deployment sequence for Pakistani ISPs.