| Prefix | Block | Addresses | First registered | Organization |
|---|---|---|---|---|
| 70:B3:D5:CB:7 | MA-S | 4.1 thousand | 9 Mar 2014 | HKC Security Ltd. |
| 70:B3:D5:F1:F | MA-S | 4.1 thousand | 19 Feb 2017 | HKC Security Ltd. |
Former HKC Limited MAC address blocks
The IEEE registry once carried 2 blocks registered to HKC Limited. All 2 blocks are now registered to HKC Security Ltd.. HKC Security Ltd. 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.