| Range From | Range To | Organisation |
|---|---|---|
| 2001:4b28:1900:: | 2001:4b28:19ff:ffff:ffff:ffff:ffff:ffff | |
| 2001:4b28:1a00:: | 2001:4b28:1aff:ffff:ffff:ffff:ffff:ffff | |
| 2001:4b28:1b00:: | 2001:4b28:1bff:ffff:ffff:ffff:ffff:ffff | |
| 2001:4b28:1c00:: | 2001:4b28:1cff:ffff:ffff:ffff:ffff:ffff | |
| 2001:4b28:1d00:: | 2001:4b28:1dff:ffff:ffff:ffff:ffff:ffff | |
| 2001:4b28:1e00:: | 2001:4b28:1eff:ffff:ffff:ffff:ffff:ffff | |
| 2001:4b28:1f00:: | 2001:4b28:1fff:ffff:ffff:ffff:ffff:ffff | |
| 2001:4b28:2000:: | 2001:4b28:20ff:ffff:ffff:ffff:ffff:ffff | |
| 2001:4b28:2100:: | 2001:4b28:21ff:ffff:ffff:ffff:ffff:ffff | |
| 2001:4b28:2200:: | 2001:4b28:22ff:ffff:ffff:ffff:ffff:ffff |