MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix8C:1F:64:3F:40:00 /36
Vendor addressCARRER ALBERT EINSTEIN, 44 TERRASSA BARCELONA ES 08223
Country🇪🇸 Spain
RegisteredFeb 13, 2022
Block range8C:1F:64:3F:40:00– 8C:1F:64:3F: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
Previous
8C:1F:64:3F:30:00 /36
Cambrian Works, Inc.
Next
8C:1F:64:3F:50:00 /36
Wuxi Eutron Electronics Technology Co.,Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
ACTELSER S.L. holds 1 registered blocks in the IEEE registry, ranking #3,970 of 33,421 organizations by block count.