MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix1C:87:74:B0:00:00 /28
Vendor addressRoom 205,Block A, Hua Feng Business Building ,Qian Jin 1st Road, Baoan 25 Area, Shenzhen 518101, China. Shenzhen Guang Dong CN 518101
Country🇨🇳 China
RegisteredOct 31, 2015
Block range1C:87:74:B0:00:00– 1C:87:74:BF: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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1C:87:74:A0:00:00 /28
Nebbiolo Technologies
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1C:87:74:C0:00:00 /28
New Nordic Engineering
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
HABEY USA Inc. holds 1 registered blocks in the IEEE registry, ranking #14,286 of 33,427 organizations by block count.