MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixD4:7C:44:90:00:00 /28
Vendor addressNo. 209 Zhuyuan Road, High-tech Zone Suzhou City Jiangsu CN 215010
Country🇨🇳 China
RegisteredMar 25, 2018
Block rangeD4:7C:44:90:00:00– D4:7C: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
Previous
D4:7C:44:80:00:00 /28
Beijing Maystar Information Technology Co., Ltd.
Next
D4:7C:44:A0:00:00 /28
Tendzone International Pte Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Suzhou Wan Dian Zhang Network Technology Co., Ltd holds 1 registered blocks in the IEEE registry, ranking #28,726 of 33,427 organizations by block count.