| Prefix | Block | Addresses | First registered | Organization |
|---|---|---|---|---|
| 00:0C:DB | MA-L | 16.8 million | 8 Apr 2003 | Brocade Communications Systems LLC |
| 00:12:F2 | MA-L | 16.8 million | 26 Nov 2004 | Brocade Communications Systems LLC |
| 00:1B:ED | MA-L | 16.8 million | 8 Apr 2007 | Brocade Communications Systems LLC |
| 00:24:38 | MA-L | 16.8 million | 9 Nov 2008 | Brocade Communications Systems LLC |
Former Foundry Networks MAC address blocks
The IEEE registry once carried 4 blocks registered to Foundry Networks. All 4 blocks are now registered to Brocade Communications Systems LLC. Brocade Communications Systems LLC 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.