MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix8C:1F:64:3D:D0:00 /36
Vendor addressC/ ALBERT EINSTEIN 34, PARQUE TECNOLOGICO DE ALAVA VITORIA - GASTEIZ ALAVA ES 01510
Country🇪🇸 Spain
RegisteredSep 8, 2025
Block range8C:1F:64:3D:D0:00– 8C:1F:64:3D:DF: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:64:3D:B0:00 /36
BRS Sistemas Eletrônicos
Next
8C:1F:64:3D:F0:00 /36
LimeSoft Co., Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
DORLET SAU holds 26 registered blocks in the IEEE registry, ranking #131 of 33,421 organizations by block count.
Other blocks registered to DORLET SAU
00:50:C2:1E:50:00 /36
IAB
00:50:C2:5A:F0:00 /36
IAB
00:50:C2:79:60:00 /36
IAB
00:50:C2:9E:70:00 /36
IAB
00:50:C2:C6:C0:00 /36
IAB
00:50:C2:E7:00:00 /36
IAB
40:D8:55:06:F0:00 /36
IAB
40:D8:55:15:A0:00 /36
IAB
70:B3:D5:13:50:00 /36
MA-S
70:B3:D5:4F:60:00 /36
MA-S
70:B3:D5:58:D0:00 /36
MA-S
70:B3:D5:63:90:00 /36
MA-S