MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixA4:11:63:20:00:00 /28
Vendor addressRoom 6012 Innovation Building ,NO.101 Southwest of 4th Ring Road, Fengtai District Beijing Beijing CN 100070
Country🇨🇳 China
RegisteredDec 4, 2016
Block rangeA4:11:63:20:00:00– A4:11:63:2F: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
A4:11:63:10:00:00 /28
INTER CONTROL Hermann Köhler Elektrik GmbH & Co.KG
Next
A4:11:63:30:00:00 /28
Pax
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Allgo Tech. (Beijing) Co.,Ltd holds 1 registered blocks in the IEEE registry, ranking #4,731 of 33,421 organizations by block count.