MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix04:71:4B:20:00:00 /28
Vendor addressF18, Yousong Business Building, Longhua New Districe, Shenzhen, China Shenzhen Guangdong CN 518109
Country🇨🇳 China
RegisteredFeb 12, 2017
Block range04:71:4B:20:00:00– 04:71:4B:2F: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
Previous
04:71:4B:10:00:00 /28
uAvionix Corporation
Next
04:71:4B:30:00:00 /28
Griesser Electronic AG
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shenzhen WayOS Technology Crop., Ltd. holds 2 registered blocks in the IEEE registry, ranking #3,043 of 33,427 organizations by block count.
Other blocks registered to Shenzhen WayOS Technology Crop., Ltd.