MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixD4:7C:44:50:00:00 /28
Vendor addressLS Bldg., Hwachang-ro, 95(Seoksoo-dong), Manan-gu Anyang-city Gyeonggi-do KR 13905
Country🇰🇷 South Korea
RegisteredApr 1, 2018
Block rangeD4:7C:44:50:00:00– D4:7C:44:5F: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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D4:7C:44:40:00:00 /28
Sammi Onformation Systems
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D4:7C:44:60:00:00 /28
ASDA ICT Co., Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
LS Communication Co.,Ltd. holds 1 registered blocks in the IEEE registry, ranking #18,831 of 33,427 organizations by block count.