MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixE0:23:3B:50:00:00 /28
Vendor addressHyundaitera Tower 1628, 8, Ori-ro 651beon-gil Gwangmyeong-si Gyeonggi-do KR 14303
Country🇰🇷 South Korea
RegisteredAug 11, 2025
Block rangeE0:23:3B:50:00:00– E0:23:3B:5F: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
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E0:23:3B:40:00:00 /28
The KIE
Next
E0:23:3B:60:00:00 /28
Kiwimoore(Shanghai) Semiconductor Co.,Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
IOFAC holds 1 registered blocks in the IEEE registry, ranking #16,561 of 33,421 organizations by block count.