macadress

ACE CAD Enterprise Co., Ltd.

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:1B:58:00:00:00 /24
Vendor address2F, No. 94, Bao Chung Road, Hsin Tien City, Taipei Hsien TW 23144
Country🇹🇼  Taiwan
RegisteredFeb 9, 2007
Block range00:1B:58:00:00:00– 00:1B:58: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. Feb 9, 2007 – Jan 14, 2008 Private name changedaddress changedcountry changed
  2. Jan 14, 2008 – present ACE CAD Enterprise Co., Ltd.

Example addresses in this block

00:1B:58:00:00:00 00:1B:58:7F:FF:FF 00:1B:58:FF:FF:FF

Where this block sits

Previous 00:1B:57:00:00:00 /24 SEMINDIA SYSTEMS PRIVATE LIMITED Next 00:1B:59:00:00:00 /24 Sony Corporation

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

ACE CAD Enterprise Co., Ltd. holds 1 registered blocks in the IEEE registry, ranking #3,881 of 33,421 organizations by block count.