macadress

Advanced Digital Broadcast, Ltd.

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:03:91:00:00:00 /24
Vendor address8F, 145 Chung Shan N. Rd. Sec. 2, TAIWAN TAIWAN TW R.O.C.
Country🇹🇼  Taiwan
RegisteredOct 24, 2001
Block range00:03:91:00:00:00– 00:03:91: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. Oct 24, 2001 – Jun 5, 2002 Advanced Digital Broadcast, Ltd. name changedaddress changed
  2. Jun 5, 2002 – Apr 3, 2004 Private name changedaddress changedcountry changed
  3. Apr 3, 2004 – present Advanced Digital Broadcast, Ltd.

Example addresses in this block

00:03:91:00:00:00 00:03:91:7F:FF:FF 00:03:91:FF:FF:FF

Where this block sits

Previous 00:03:90:00:00:00 /24 Digital Video Communications, Inc. Next 00:03:92:00:00:00 /24 Hyundai Teletek Co., Ltd.

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

Advanced Digital Broadcast, Ltd. holds 1 registered blocks in the IEEE registry, ranking #4,183 of 33,421 organizations by block count.