MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix8C:1F:64:D5:70:00 /36
Vendor addressWielicka 28 Krakow PL 30-552
Country🇵🇱 Poland
RegisteredMay 26, 2026
Block range8C:1F:64:D5:70:00– 8C:1F:64:D5:7F: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 →
Example addresses in this block
Where this block sits
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Integer.pl S.A. holds 12 registered blocks in the IEEE registry, ranking #262 of 33,421 organizations by block count.
Other blocks registered to Integer.pl S.A.