3Com Ltd

MA-L

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

Prefix00:14:7C:00:00:00 /24

Vendor addressPeoplebuilding 2 Hemel Hempstead Herts GB HP2 4NW

RegisteredMay 7, 2005

Block range00:14:7C:00:00:00– 00:14:7C: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

May 7, 2005 – Jan 14, 2008 3Com Europe Ltd name changedaddress changed
Jan 14, 2008 – present 3Com Ltd

Example addresses in this block

00:14:7C:00:00:00 00:14:7C:7F:FF:FF 00:14:7C:FF:FF:FF

Where this block sits

Previous 00:14:7B:00:00:00 /24 Iteris, Inc. Next 00:14:7D:00:00:00 /24 Aeon Digital International

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

3Com Ltd holds 11 registered blocks in the IEEE registry, ranking #270 of 33,421 organizations by block count.

Other blocks registered to 3Com Ltd

00:0A:04:00:00:00 /24 MA-L 00:0B:AC:00:00:00 /24 MA-L 00:0D:54:00:00:00 /24 MA-L 00:0E:6A:00:00:00 /24 MA-L 00:0F:CB:00:00:00 /24 MA-L 00:12:A9:00:00:00 /24 MA-L 00:16:E0:00:00:00 /24 MA-L 00:18:6E:00:00:00 /24 MA-L 00:1A:C1:00:00:00 /24 MA-L 00:1C:C5:00:00:00 /24 MA-L