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:81:BE:40:00:00 /28
Vendor addressRoom 3-318, Office Building 3, Xiangcheng Paradise Walk, No. 455 Jiayuan Road, Yuanhe Subdistrict, Xiangcheng District, Suzhou City, Jiangsu Province Suzhou CN 215000
Country🇨🇳 China
Block range4C:81:BE:40:00:00– 4C:81:BE:4F: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:81:BE:20:00:00 /28
Annapurna labs
Next
4C:81:BE:50:00:00 /28
Pratap digital communications pvt ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Suzhou APAQI Robotics Technology Co., Ltd. holds 1 registered blocks in the IEEE registry, ranking #28,671 of 33,421 organizations by block count.