MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixAC:EF:92:30:00:00 /28
Vendor addressRoom 220B, Building 1, No. 18 Longqing Street, Beijing Economic and Technological Development Zone Beijing CN 100176
Country🇨🇳 China
RegisteredOct 19, 2024
Block rangeAC:EF:92:30:00:00– AC:EF:92:3F: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
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AC:EF:92:20:00:00 /28
EVA Precision Industrial Holdings Limited
Next
AC:EF:92:40:00:00 /28
LIFT CONTROLS PRIVATE LIMITED
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
JiZhiKang (Beijing) Technology Co., Ltd holds 1 registered blocks in the IEEE registry, ranking #17,215 of 33,427 organizations by block count.