Cambridge Broadband Networks Group

MA-L

MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.

Prefix00:CB:BD:00:00:00 /24

Vendor address1 Hammersmith Broadway London GB W6 9DL

RegisteredJun 4, 2001

Block range00:CB:BD:00:00:00– 00:CB:BD: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 4, 2001 – Dec 31, 2007 Cambridge Broadband Ltd. name changedaddress changed
Dec 31, 2007 – May 30, 2020 Cambridge Broadband Networks Ltd. name changedaddress changed
May 30, 2020 – present Cambridge Broadband Networks Group

Example addresses in this block

00:CB:BD:00:00:00 00:CB:BD:7F:FF:FF 00:CB:BD:FF:FF:FF

Where this block sits

Cambridge Broadband Networks Group holds 1 registered blocks in the IEEE registry, ranking #7,712 of 33,421 organizations by block count.