MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix00:1B:C5:0A:40:00 /36
Vendor addressHUTNICZA 3 GDYNIA Pomorskie PL 81-212
Country🇵🇱 Poland
RegisteredJun 9, 2013
Block range00:1B:C5:0A:40:00– 00:1B:C5:0A:4F: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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00:1B:C5:0A:30:00 /36
P A Network Laboratory Co.,Ltd
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00:1B:C5:0A:50:00 /36
Tesla Controls
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
RADMOR S.A. holds 1 registered blocks in the IEEE registry, ranking #24,123 of 33,427 organizations by block count.