macadress

Cambridge Industries Group (CIG)

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:0B:40:00:00:00 /24
Vendor address2560 Junction Avenue San Jose US 95134
Country🇺🇸  United States
RegisteredOct 14, 2002
Block range00:0B:40:00:00:00– 00:0B:40: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

  1. Oct 14, 2002 – Dec 4, 2012 OpNext Inc. name changedaddress changed
  2. Dec 4, 2012 – Jan 31, 2013 Oclaro name changedaddress changed
  3. Jan 31, 2013 – Feb 14, 2013 OpNext Inc. name changedaddress changed
  4. Feb 14, 2013 – Jun 12, 2019 Oclaro name changed
  5. Jun 12, 2019 – present Cambridge Industries Group (CIG)

Example addresses in this block

00:0B:40:00:00:00 00:0B:40:7F:FF:FF 00:0B:40:FF:FF:FF

Where this block sits

Previous 00:0B:3F:00:00:00 /24 Anthology Solutions Inc. Next 00:0B:41:00:00:00 /24 Ing. Büro Dr. Beutlhauser

The nearest registered blocks of the same size on either side of this one in IEEE's address space.

Cambridge Industries Group (CIG) holds 1 registered blocks in the IEEE registry, ranking #7,716 of 33,427 organizations by block count.