MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix08:3C:03:90:00:00 /28
Vendor address4711 Yonge Street, 10th Floor, North York, Canada North York Ontario CA M2N 6K8
Country🇨🇦 Canada
RegisteredJan 16, 2026
Block range08:3C:03:90:00:00– 08:3C:03:9F: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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08:3C:03:80:00:00 /28
GS Industrie-Elektronik GmbH
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08:3C:03:A0:00:00 /28
Luxshare Precision Industry Co., Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
INNOS TECHNOLOGIES INC. holds 1 registered blocks in the IEEE registry, ranking #16,111 of 33,421 organizations by block count.