MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixB0:B3:53:30:00:00 /28
Vendor addressC/ Crisol 3, despacho 17 Rivas-Vaciamadrid Madrid ES 28522
Country🇪🇸 Spain
RegisteredNov 24, 2019
Block rangeB0:B3:53:30:00:00– B0:B3:53:3F: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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B0:B3:53:20:00:00 /28
Rizhao SUNWAM International Co., Ltd.
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B0:B3:53:40:00:00 /28
Innotas Elektronik GmbH
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
AD HOC DEVELOPMENTS S.L holds 2 registered blocks in the IEEE registry, ranking #1,443 of 33,421 organizations by block count.
Other blocks registered to AD HOC DEVELOPMENTS S.L