MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix04:11:19:40:00:00 /28
Vendor addressRm2327, Building23, No.18 Anningzhuang East Road, Haidian District Bei Jing CN 100000
Country🇨🇳 China
RegisteredDec 19, 2020
Block range04:11:19:40:00:00– 04:11:19:4F: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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04:11:19:30:00:00 /28
SUZHOU RIBAO TECHNOLOGY CO.,LTD.
Next
04:11:19:50:00:00 /28
CEITA COMMUNICATION TECHNOLOGY CO.,LTD
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Bolicom Innovation Technology (BeiJing) Co.,LTD. holds 1 registered blocks in the IEEE registry, ranking #7,244 of 33,427 organizations by block count.