MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:18:7B:00:00:00 /24
Vendor address3F, Hana Bldg Guro-Gu Seoul KR 152-100
Country🇰🇷 South Korea
RegisteredJun 13, 2006
Block range00:18:7B:00:00:00– 00:18:7B: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.
4NSYS Co. Ltd. holds 1 registered blocks in the IEEE registry, ranking #3,603 of 33,421 organizations by block count.