MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:23:67:00:00:00 /24
Vendor addressKrenicka 2257 Prague 10 CZ 100 00
Country🇨🇿 Czechia
RegisteredOct 8, 2008
Block range00:23:67:00:00:00– 00:23:67: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 →
Example addresses in this block
Where this block sits
Previous
00:23:66:00:00:00 /24
Beijing Siasun Electronic System Co.,Ltd.
Next
00:23:68:00:00:00 /24
Zebra Technologies Inc
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
UniControls a.s. holds 1 registered blocks in the IEEE registry, ranking #30,915 of 33,421 organizations by block count.