| Prefix | Block | Addresses | First registered | Organization |
|---|---|---|---|---|
| 00:90:58 | MA-L | 16.8 million | 27 Apr 2016 | Ultra Electronics Command & Control Systems |
| 00:E0:6C | MA-L | 16.8 million | 25 Jun 2013 | Ultra Electronics Command & Control Systems |
Former Ultra Electronics Limited (AEP Networks) MAC address blocks
The IEEE registry once carried 2 blocks registered to Ultra Electronics Limited (AEP Networks). All 2 blocks are now registered to Ultra Electronics Command & Control Systems. Ultra Electronics Command & Control Systems 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.