| Prefix | Block | Addresses | First registered | Organization |
|---|---|---|---|---|
| 00:14:8C | MA-L | 16.8 million | 7 May 2005 | General Dynamics Mission Systems |
| 00:25:D4 | MA-L | 16.8 million | 12 Apr 2009 | General Dynamics Mission Systems |
Former Fortress Technologies MAC address blocks
The IEEE registry once carried 2 blocks registered to Fortress Technologies. All 2 blocks are now registered to General Dynamics Mission Systems. General Dynamics Mission 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.