| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| 00:50:C2:19:4 | IAB | 4.1 thousand | CZ | 30 Jul 2008 |
| 00:50:C2:77:E | IAB | 4.1 thousand | CZ | 30 Jul 2008 |
| 40:D8:55:06:1 | IAB | 4.1 thousand | CZ | 5 Dec 2012 |
| 70:B3:D5:0A:0 | MA-S | 4.1 thousand | CZ | 9 Apr 2017 |
| 70:B3:D5:61:7 | MA-S | 4.1 thousand | CZ | 18 Oct 2019 |
| 70:B3:D5:6F:5 | MA-S | 4.1 thousand | CZ | 7 Jun 2020 |
| 8C:1F:64:8E:4 | MA-S | 4.1 thousand | CZ | 30 Jan 2024 |
| 8C:1F:64:8E:8 | MA-S | 4.1 thousand | CZ | 22 Feb 2023 |
Every block registered to Cominfo, Inc. in the IEEE registries, complete. Free-text search also matches former owners.