MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixA0:24:90:40:00:00 /28
Vendor address37, Gwacheon-daero 7na-gil Gwacheon-si Gyeonggi-do KR 13840
Country🇰🇷 South Korea
RegisteredMay 27, 2026
Block rangeA0:24:90:40:00:00– A0:24:90:4F:FF:FF
Address capacity1,048,576
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.
Nefence Inc. holds 1 registered blocks in the IEEE registry, ranking #20,822 of 33,427 organizations by block count.