macadress

Oracle Corporation

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:21:28:00:00:00 /24
Vendor address17 Network Circle Menlo Park CA US 95025
Country🇺🇸  United States
RegisteredApr 14, 2008
Block range00:21:28:00:00:00– 00:21:28: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. Apr 14, 2008 – Jun 24, 2010 Sun Microsystems Inc name changedaddress changed
  2. Jun 24, 2010 – present Oracle Corporation

Example addresses in this block

00:21:28:00:00:00 00:21:28:7F:FF:FF 00:21:28:FF:FF:FF

Where this block sits

Previous 00:21:27:00:00:00 /24 TP-LINK TECHNOLOGIES CO.,LTD. Next 00:21:29:00:00:00 /24 Cisco-Linksys, LLC

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

Oracle Corporation holds 16 registered blocks in the IEEE registry, ranking #208 of 33,421 organizations by block count.

Other blocks registered to Oracle Corporation

00:00:7D:00:00:00 /24 MA-L 00:01:5D:00:00:00 /24 MA-L 00:03:BA:00:00:00 /24 MA-L 00:07:82:00:00:00 /24 MA-L 00:0F:4B:00:00:00 /24 MA-L 00:10:4F:00:00:00 /24 MA-L 00:10:E0:00:00:00 /24 MA-L 00:13:97:00:00:00 /24 MA-L 00:14:4F:00:00:00 /24 MA-L 00:20:F2:00:00:00 /24 MA-L 00:21:F6:00:00:00 /24 MA-L 00:A0:A4:00:00:00 /24 MA-L