MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixA8:3F:A1:B0:00:00 /28
Vendor addressvia di corticella 201 bologna BO IT 40128
Country🇮🇹 Italy
RegisteredJul 15, 2018
Block rangeA8:3F:A1:B0:00:00– A8:3F:A1:BF: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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A8:3F:A1:A0:00:00 /28
Shanghai East China Computer Co., Ltd
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A8:3F:A1:C0:00:00 /28
Laonz Co.,Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Exel s.r.l. unipersonale holds 1 registered blocks in the IEEE registry, ranking #12,353 of 33,427 organizations by block count.