MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix78:C2:C0:C0:00:00 /28
Vendor addressRoom 2008, Feidiao International Building Shanghai Shanghai CN 200030
Country🇨🇳 China
RegisteredOct 16, 2015
Block range78:C2:C0:C0:00:00– 78:C2:C0:CF: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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78:C2:C0:B0:00:00 /28
Wan Chao An (Beijing) Technology Co., Ltd.
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78:C2:C0:D0:00:00 /28
KORF Inc.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shanghai Hanyi Technologies Co,.Ltd. holds 1 registered blocks in the IEEE registry, ranking #25,940 of 33,427 organizations by block count.