MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:21:B7:00:00:00 /24
Vendor address740 West New Circle Road Lexington KY US 40550
Country🇺🇸 United States
RegisteredJun 18, 2008
Block range00:21:B7:00:00:00– 00:21:B7: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 18, 2008 – Jan 17, 2019 Lexmark International Inc. name changed
- Jan 17, 2019 – present LEXMARK INTERNATIONAL, INC.
Example addresses in this block
Where this block sits
Previous
00:21:B6:00:00:00 /24
Triacta Power Technologies Inc.
Next
00:21:B8:00:00:00 /24
Inphi Corporation
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
LEXMARK INTERNATIONAL, INC. holds 5 registered blocks in the IEEE registry, ranking #605 of 33,421 organizations by block count.
Other blocks registered to LEXMARK INTERNATIONAL, INC.