MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix4C:91:7A:D0:00:00 /28
Vendor addressRoom 802, Tower A, Yuanzheng Venture Building, No. 19 Langshan Road, Nanshan District Shenzhen CN 518000
Country🇨🇳 China
RegisteredJul 1, 2019
Block range4C:91:7A:D0:00:00– 4C:91:7A:DF: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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4C:91:7A:C0:00:00 /28
Alibaba (Beijing) Software Service Inc.
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4C:91:7A:E0:00:00 /28
Annapurna labs
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shenzhen bankledger Technology Co, Ltd holds 1 registered blocks in the IEEE registry, ranking #26,228 of 33,421 organizations by block count.