MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix78:D4:F1:80:00:00 /28
Vendor addressXiamen Cheerzing IOT Technology Co.,Ltd. Xiamen FuJian CN 361002
Country🇨🇳 China
RegisteredNov 14, 2020
Block range78:D4:F1:80:00:00– 78:D4:F1:8F: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
78:D4:F1:70:00:00 /28
Famar Fueguina S.A.
Next
78:D4:F1:90:00:00 /28
shanghai baudcom communication device co.,ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Xiamen Cheerzing IOT Technology Co.,Ltd. holds 2 registered blocks in the IEEE registry, ranking #3,449 of 33,427 organizations by block count.
Other blocks registered to Xiamen Cheerzing IOT Technology Co.,Ltd.