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:D1:6E:20:00:00 /28
Vendor addressEdison, 10 Trezzano sul Naviglio Milano IT 20090
Country🇮🇹 Italy
RegisteredJul 31, 2019
Block range04:D1:6E:20:00:00– 04:D1:6E:2F: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:D1:6E:10:00:00 /28
Launch Tech Co., Ltd.
Next
04:D1:6E:30:00:00 /28
Beijing Huaxia Qixin Technology Co., Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
s.d.i. s.p.a. holds 1 registered blocks in the IEEE registry, ranking #24,935 of 33,427 organizations by block count.