It means the number of operator allocated IPv6 address by RIR.

It means the number of prospective end-user estimated by operator.

It means the number of actual use by operator.

IPv6 address block is currently allocated by such RIRs like APNIC, ARIN, LACNIC, RIPE NCC and Afrinic, and they put specific data about allocated address range, prefix length, allocated country name and allocated data on their FTP servers everyday to open them to the public. This research uses that public data to count the number of allocated address block. The count is sorted by country and each RIR.

By the reference of the data above (1), this research converts each /32 allocated address block into a unit. A unit indicates the scale of allocation. This conversion is sorted by country and each RIR.

By the reference of the data above (1), this research uses Whois database as hierarchy search by each allocated address block. And that data is converted each /48 into a unit. A unit indicates the scale of assigned address block to the end-user. This conversion is sorted by country and each RIR.