| Range From | Range To | Organisation |
|---|---|---|
| 2a03:521:: | 2a03:521:0:ffff:ffff:ffff:ffff:ffff | |
| 2a03:521:1:: | 2a03:521:1:ff:ffff:ffff:ffff:ffff | |
| 2a03:521:1:100:: | 2a03:521:1:1ff:ffff:ffff:ffff:ffff | |
| 2a03:521:1:200:: | 2a03:521:1:2ff:ffff:ffff:ffff:ffff | |
| 2a03:521:1:300:: | 2a03:521:1:ffff:ffff:ffff:ffff:ffff | |
| 2a03:521:2:: | 2a03:521:1110:ffff:ffff:ffff:ffff:ffff | |
| 2a03:521:1111:: | 2a03:521:1111:15f:ffff:ffff:ffff:ffff | |
| 2a03:521:1111:160:: | 2a03:521:1111:160:ffff:ffff:ffff:ffff | |
| 2a03:521:1111:161:: | 2a03:521:1111:ffff:ffff:ffff:ffff:ffff | |
| 2a03:521:1112:: | 2a03:521:b00a:ffff:ffff:ffff:ffff:ffff |