MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix3C:42:7E:40:00:00 /28
Vendor addressIlmarisentie 8 Lahti FI 15200
Country🇫🇮 Finland
RegisteredApr 8, 2018
Block range3C:42:7E:40:00:00– 3C:42:7E: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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3C:42:7E:30:00:00 /28
Shenzhen VETAS Communication Technology Co , Ltd.
Next
3C:42:7E:50:00:00 /28
Geoplan Korea
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Teknoware Oy holds 1 registered blocks in the IEEE registry, ranking #29,469 of 33,427 organizations by block count.