MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix70:B3:D5:CB:70:00 /36
Vendor addressParkway Business Centre Ballymount Dublin IE Dublin 24
Country🇮🇪 Ireland
RegisteredMar 9, 2014
Block range70:B3:D5:CB:70:00– 70:B3:D5:CB:7F: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 →
Ownership timeline
- Mar 9, 2014 – Jul 15, 2022 HKC Limited name changed
- Jul 15, 2022 – present HKC Security Ltd.
Example addresses in this block
Where this block sits
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70:B3:D5:CB:60:00 /36
Kuebrich Ingeniergesellschaft mbh & Co. KG
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70:B3:D5:CB:80:00 /36
Verti Tecnologia
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
HKC Security Ltd. holds 4 registered blocks in the IEEE registry, ranking #746 of 33,421 organizations by block count.
Other blocks registered to HKC Security Ltd.