MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixD4:61:37:80:00:00 /28
Vendor addressR301, 3F, NO9, shangdi 9th street, haidian district, beijing Beijing Beijing CN 100085
Country🇨🇳 China
RegisteredAug 26, 2022
Block rangeD4:61:37:80:00:00– D4:61:37:8F: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
D4:61:37:70:00:00 /28
Beijing Shudun Information Technology Co., Ltd
Next
D4:61:37:90:00:00 /28
Mavenir Systems, Inc.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Beijing Digital China Yunke Technology Limited holds 1 registered blocks in the IEEE registry, ranking #6,525 of 33,427 organizations by block count.