macadress

Zyxel Communications Corporation

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:A0:C5:00:00:00 /24
Vendor addressNo. 6 Innovation Road II, Science Park Hsichu Taiwan TW 300
Country🇹🇼  Taiwan
RegisteredApr 22, 1998
Block range00:A0:C5:00:00:00– 00:A0:C5: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 – Apr 9, 2015 ZYXEL COMMUNICATION name changed
  2. Apr 9, 2015 – present Zyxel Communications Corporation

Example addresses in this block

00:A0:C5:00:00:00 00:A0:C5:7F:FF:FF 00:A0:C5:FF:FF:FF

Where this block sits

Previous 00:A0:C4:00:00:00 /24 CRISTIE ELECTRONICS LTD. Next 00:A0:C6:00:00:00 /24 Qualcomm Inc.

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

Zyxel Communications Corporation holds 72 registered blocks in the IEEE registry, ranking #53 of 33,427 organizations by block count.

Other blocks registered to Zyxel Communications Corporation

00:13:49:00:00:00 /24 MA-L 00:19:CB:00:00:00 /24 MA-L 00:23:F8:00:00:00 /24 MA-L 04:23:36:00:00:00 /24 MA-L 04:BF:6D:00:00:00 /24 MA-L 08:26:97:00:00:00 /24 MA-L 10:71:B3:00:00:00 /24 MA-L 10:7B:EF:00:00:00 /24 MA-L 10:C5:FA:00:00:00 /24 MA-L 14:33:75:00:00:00 /24 MA-L 14:36:0E:00:00:00 /24 MA-L 14:C7:C4:00:00:00 /24 MA-L