MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:21:42:00:00:00 /24
Vendor addressBulevar Zorana Djindjica 8a Belgrade Serbia YU 11070
Country🇷🇸 Serbia
RegisteredJun 18, 2008
Block range00:21:42:00:00:00– 00:21:42: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
- Jun 18, 2008 – Dec 21, 2009 ABS Control Systems doo name changedaddress changed
- Dec 21, 2009 – present Advanced Control Systems doo
Example addresses in this block
Where this block sits
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Advanced Control Systems doo holds 1 registered blocks in the IEEE registry, ranking #4,179 of 33,427 organizations by block count.