macadress

Alcatel Alenia Space Italia

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:15:3F:00:00:00 /24
Vendor addressStrada Padana Superiore 290 Vimodrone MI IT 20090
Country🇮🇹  Italy
RegisteredJul 21, 2005
Block range00:15:3F:00:00:00– 00:15:3F: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. Jul 21, 2005 – Feb 20, 2007 Alenia Spazio S.p.A. name changedaddress changed
  2. Feb 20, 2007 – present Alcatel Alenia Space Italia

Example addresses in this block

00:15:3F:00:00:00 00:15:3F:7F:FF:FF 00:15:3F:FF:FF:FF

Where this block sits

Previous 00:15:3E:00:00:00 /24 Q-Matic Sweden AB Next 00:15:40:00:00:00 /24 Nortel Networks

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

Alcatel Alenia Space Italia holds 1 registered blocks in the IEEE registry, ranking #4,625 of 33,421 organizations by block count.