MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix00:1B:C5:0A:00:00 /36
Vendor addressul. Jasnogórska 44 Kraków PL 31-358
Country🇵🇱 Poland
RegisteredMay 20, 2013
Block range00:1B:C5:0A:00:00– 00:1B:C5:0A:0F: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
- May 20, 2013 – May 5, 2020 HomerSoft sp. z o.o. name changedaddress changed
- May 5, 2020 – present Silvair
Example addresses in this block
Where this block sits
Previous
00:1B:C5:09:F0:00 /36
ENTE Sp. z o.o.
Next
00:1B:C5:0A:10:00 /36
Hangzhou Zhiping Technology Co., Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Silvair holds 1 registered blocks in the IEEE registry, ranking #27,426 of 33,421 organizations by block count.