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:6E:44:90:00:00 /28
Vendor addressRoom 34, 7th Floor, Unit 2, Building 5, No. 68 Yangzi Mountain Road, Chenghua District Chengdu Sichuan CN 610000
Country🇨🇳 China
RegisteredApr 15, 2026
Block range4C:6E:44:90:00:00– 4C:6E:44:9F: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:6E:44:80:00:00 /28
Shenzhen iTayga Technology Co.,Ltd
Next
4C:6E:44:A0:00:00 /28
Swistec GmbH
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Chengdu Ruibitechuang Technology Co.,Ltd holds 1 registered blocks in the IEEE registry, ranking #8,273 of 33,427 organizations by block count.