macadress

Bridgeworks Ltd.

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:04:1B:00:00:00 /24
Vendor addressUnit 1 Aero Centre Ampress Park Lymington Hampshire GB SO41 8QF
Country🇬🇧  United Kingdom
RegisteredNov 9, 2000
Block range00:04:1B:00:00:00– 00:04:1B: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. Nov 9, 2000 – Jun 23, 2009 Digital Interfaces Ltd. name changedaddress changed
  2. Jun 23, 2009 – present Bridgeworks Ltd.

Example addresses in this block

00:04:1B:00:00:00 00:04:1B:7F:FF:FF 00:04:1B:FF:FF:FF

Where this block sits

Previous 00:04:1A:00:00:00 /24 Ines Test and Measurement GmbH & CoKG Next 00:04:1C:00:00:00 /24 ipDialog, Inc.

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

Bridgeworks Ltd. holds 1 registered blocks in the IEEE registry, ranking #7,381 of 33,421 organizations by block count.