| Prefix | Block | Addresses | First registered | Organization |
|---|---|---|---|---|
| 00:03:74 | MA-L | 16.8 million | 23 Jun 2009 | Schneider Electric |
| 00:05:21 | MA-L | 16.8 million | 2 Feb 2001 | Schneider Electric |
Former Control Microsystems MAC address blocks
The IEEE registry once carried 2 blocks registered to Control Microsystems. All 2 blocks are now registered to Schneider Electric. Schneider Electric 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.