macadress

Network General Corporation

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:00:65:00:00:00 /24
Vendor address178 E Tsaman Dr San Jose CA US 95134
Country🇺🇸  United States
RegisteredApr 22, 1998
Block range00:00:65:00:00:00– 00:00:65: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 22, 1998 – Sep 8, 2000 NETWORK GENERAL CORPORATION name changedaddress changed
  2. Sep 8, 2000 – Jun 25, 2005 NETWORK ASSOCIATES, INC. name changedaddress changed
  3. Jun 25, 2005 – present Network General Corporation

Example addresses in this block

00:00:65:00:00:00 00:00:65:7F:FF:FF 00:00:65:FF:FF:FF

Where this block sits

Previous 00:00:64:00:00:00 /24 DTS INSIGHT Corporation Next 00:00:66:00:00:00 /24 TALARIS SYSTEMS, INC.

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

NETWORK GENERAL CORPORATION holds 2 registered blocks in the IEEE registry, ranking #2,608 of 33,427 organizations by block count.