MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix70:B3:D5:54:C0:00 /36
Vendor addressRzepakowa 5e Krakow malopolska PL 31-989
Country🇵🇱 Poland
RegisteredSep 25, 2016
Block range70:B3:D5:54:C0:00– 70:B3:D5:54:CF:FF
Address capacity4,096
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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70:B3:D5:54:B0:00 /36
Brakels IT
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70:B3:D5:54:D0:00 /36
Qingdao Haitian Weiye Automation Control System Co., Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Husty M.Styczen J.Hupert Sp.J. holds 7 registered blocks in the IEEE registry, ranking #426 of 33,427 organizations by block count.
Other blocks registered to Husty M.Styczen J.Hupert Sp.J.