| Prefix | Block | Addresses | First registered | Organization |
|---|---|---|---|---|
| 00:50:C2:DE:7 | IAB | 4.1 thousand | 13 Mar 2011 | Bucher Automation Budapest |
| 00:50:C2:F2:7 | IAB | 4.1 thousand | 29 Jan 2012 | Bucher Automation Budapest |
| 00:50:C2:FD:A | IAB | 4.1 thousand | 12 Aug 2012 | Bucher Automation Budapest |
| 40:D8:55:0D:2 | IAB | 4.1 thousand | 7 Apr 2013 | Bucher Automation Budapest |
| 40:D8:55:1A:C | IAB | 4.1 thousand | 10 Nov 2013 | Bucher Automation Budapest |
| E4:95:6E:5 | MA-M | 1 million | 16 Oct 2015 | Bucher Automation Budapest |
Former ELAN SYSTEMS MAC address blocks
The IEEE registry once carried 6 blocks registered to ELAN SYSTEMS. All 6 blocks are now registered to Bucher Automation Budapest. Bucher Automation Budapest took over all of them.
Complete as of the current IEEE registry deploy. Dates are when each registration was first observed in public data, not legal assignment dates.