MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix8C:1F:64:57:40:00 /36
Vendor address403 S. Jim Wright Freeway (Suite 185) Fort Worth TX US 76108
Country🇺🇸 United States
RegisteredFeb 14, 2025
Block range8C:1F:64:57:40:00– 8C:1F:64:57:4F: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:64:57:30:00 /36
Ingenious Technology LLC
Next
8C:1F:64:57:50:00 /36
Yu Heng Electric CO. TD
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Flock Audio Inc. holds 1 registered blocks in the IEEE registry, ranking #12,826 of 33,427 organizations by block count.