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:A9:20:00:00 /28
Vendor addressUnit 3, Room 201, No. 1152 Jimei North Avenue, Software Park Phase III, Xiamen Torch High-tech Zone, Xiamen, China Xiamen CN 361000
Country🇨🇳 China
RegisteredAug 25, 2026
Block range04:EC:A9:20:00:00– 04:EC:A9:2F: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.
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Example addresses in this block
Where this block sits
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04:EC:A9:10:00:00 /28
Studds Accessories LTD
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04:EC:A9:30:00:00 /28
Hunan Zetian Zhihang Electronic Technology Co., Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Xiamen CamThink Technology Co ., Ltd holds 1 registered blocks in the IEEE registry, ranking #32,758 of 33,498 organizations by block count.