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:EC:A9:80:00:00 /28
Vendor addressUnit 1303, Building B2, Creative Building, No. 162 Science Avenue, Guangzhou Development Zone Guangzhou CN 51000
Country🇨🇳 China
RegisteredAug 21, 2026
Block range04:EC:A9:80:00:00– 04:EC:A9:8F: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
04:EC:A9:70:00:00 /28
CORETEC Inc.
Next
04:EC:A9:A0:00:00 /28
Leegiot Intelligent Technology Co., Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Guangzhou Xinhong Communication Technology Co.,Ltd holds 2 registered blocks in the IEEE registry, ranking #2,133 of 33,427 organizations by block count.
Other blocks registered to Guangzhou Xinhong Communication Technology Co.,Ltd