MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:12:5D:00:00:00 /24
Vendor address#205, Lotte Suntech City, 513-15 Sungnam Kyunggi KR 462-806
Country🇰🇷 South Korea
RegisteredSep 12, 2004
Block range00:12:5D:00:00:00– 00:12:5D: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
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
CyberNet Inc. holds 1 registered blocks in the IEEE registry, ranking #9,579 of 33,427 organizations by block count.