| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| 88:3C:C5:7 | MA-M | 1 million | BG | 4 Jun 2022 |
| 40:D8:55:16:3 | IAB | 4.1 thousand | BG | 25 Aug 2013 |
| 70:B3:D5:0A:F | MA-S | 4.1 thousand | BG | 29 Oct 2017 |
| 70:B3:D5:29:9 | MA-S | 4.1 thousand | BG | 4 Jul 2019 |
| 70:B3:D5:3A:5 | MA-S | 4.1 thousand | BG | 27 Mar 2016 |
| 70:B3:D5:54:0 | MA-S | 4.1 thousand | BG | 15 Oct 2020 |
| 70:B3:D5:6D:6 | MA-S | 4.1 thousand | BG | 15 Jun 2014 |
| 8C:1F:64:6E:0 | MA-S | 4.1 thousand | BG | 1 Oct 2025 |
| 8C:1F:64:6E:A | MA-S | 4.1 thousand | BG | 31 Jul 2021 |
Every block registered to KMtronic ltd in the IEEE registries, complete. Free-text search also matches former owners.