MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:11:87:00:00:00 /24
Vendor address1021 W. Adams St Chicago IL US 60607
Country🇺🇸 United States
RegisteredJun 5, 2004
Block range00:11:87:00:00:00– 00:11:87:FF:FF:FF
Address capacity16,777,216
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 →
Ownership timeline
- Jun 5, 2004 – Jun 15, 2004 Category Solutions Inc name changed
- Jun 15, 2004 – present Category Solutions, Inc
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.
Category Solutions, Inc holds 1 registered blocks in the IEEE registry, ranking #7,914 of 33,427 organizations by block count.