The IEEE registry carries 2 blocks registered to Spectrum FiftyNine BV, together 1.1 million addresses, first observed 17 Sep 2022, most recently 25 Nov 2025.
Registered in NL.
| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| 5C:5C:75:9 | MA-M | 1 million | NL | 25 Nov 2025 |
| 8C:1F:64:14:5 | MA-S | 4.1 thousand | NL | 17 Sep 2022 |
Every block registered to Spectrum FiftyNine BV in the IEEE registries, complete. Free-text search also matches former owners.
Complete as of the current IEEE registry deploy. Dates are when each registration was first observed in public data, not legal assignment dates.