MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:1C:61:00:00:00 /24
Vendor addressRoom 1101-03, 11/F Enterprise Square Two Kowloon Bay Kowloon HK
RegisteredMay 13, 2007
Block range00:1C:61:00:00:00– 00:1C:61: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. May 13, 2007 – Jan 30, 2013 Galaxy Technology (HK) Ltd. name changedaddress changed
  2. Jan 30, 2013 – Jan 31, 2013 Galaxy Microsystems LImited name changedaddress changed
  3. Jan 31, 2013 – Feb 14, 2013 Galaxy Technology (HK) Ltd. name changedaddress changed
  4. Feb 14, 2013 – present Galaxy Microsystems LImited

Example addresses in this block

Where this block sits

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

Galaxy Microsystems LImited holds 1 registered blocks in the IEEE registry, ranking #13,293 of 33,421 organizations by block count.