| Prefix | Block | Addresses | First registered | Organization |
|---|---|---|---|---|
| 00:A0:B0 | MA-L | 16.8 million | 22 Apr 1998 | I-O DATA, INC. |
| 34:76:C5 | MA-L | 16.8 million | 3 Apr 2012 | I-O DATA, INC. |
| 50:41:B9 | MA-L | 16.8 million | 29 Jan 2019 | I-O DATA, INC. |
Former I-O DATA DEVICE, INC. MAC address blocks
The IEEE registry once carried 3 blocks registered to I-O DATA DEVICE, INC.. All 3 blocks are now registered to I-O DATA, INC.. I-O DATA, INC. 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.