MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix18:66:96:60:00:00 /28
Vendor address2101, Chentian R&D Building, No. 50, Baotian 1st Road, Chentian Community, Xixiang Street, Bao'an District Shenzhen Guangdong Province CN 518102
Country🇨🇳 China
RegisteredJan 23, 2025
Block range18:66:96:60:00:00– 18:66:96:6F: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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18:66:96:50:00:00 /28
Wuhan Precise Electronics Co.,Ltd.
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18:66:96:70:00:00 /28
Shandong Hummingbird Internet of Things Technology Co., Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shenzhen Safecuit Photonic Technology Co., Ltd holds 1 registered blocks in the IEEE registry, ranking #26,834 of 33,427 organizations by block count.