macadress

Velorum B.V

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixA0:83:B4:00:00:00 /24
Vendor addressKalkhofseweg 20 Haps NL 5443NA
Country🇳🇱  Netherlands
RegisteredOct 24, 2021
Block rangeA0:83:B4:00:00:00– A0:83:B4:FF:FF:FF
Address capacity16,777,216
AdministrationUniversally administered: its prefix comes from a block registered through the IEEE Registration Authority
TransmissionUnicast: addressed to a single device
SourceIEEE Registration Authority

Address capacity is the size of this registered block, not a count of devices actually manufactured or online. Registration identifies the organization holding the block, not a specific device model or unit.

Curious how a prefix like this turns into a full address? See how MAC addresses are structured →

Ownership timeline

  1. Oct 24, 2021 – May 13, 2025 HeNet B.V. name changed
  2. May 13, 2025 – present Velorum B.V

Example addresses in this block

A0:83:B4:00:00:00 A0:83:B4:7F:FF:FF A0:83:B4:FF:FF:FF

Where this block sits

Velorum B.V holds 1 registered blocks in the IEEE registry, ranking #31,307 of 33,427 organizations by block count.