MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix8C:1F:64:B3:30:00 /36
Vendor addressPhase One, Ratho park, 88 Glasgow Rd, Ratho Station, Newbridge Edinburgh GB EH28 8PP
Country🇬🇧 United Kingdom
RegisteredMay 8, 2026
Block range8C:1F:64:B3:30:00– 8C:1F:64:B3:3F: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:B3:20:00 /36
Plug Power
Next
8C:1F:64:B3:50:00 /36
RADA Electronics Industries Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Skylark Lasers holds 1 registered blocks in the IEEE registry, ranking #27,634 of 33,427 organizations by block count.