macadress

IDT Technology Limited

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:17:7D:00:00:00 /24
Vendor addressBlock C, 9/F, Kaiser Estate, Phase I na HK na
Country🇭🇰  Hong Kong
RegisteredMar 6, 2006
Block range00:17:7D:00:00:00– 00:17:7D: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. Mar 6, 2006 – Feb 6, 2016 IDT International Limited name changedaddress changed
  2. Feb 6, 2016 – present IDT Technology Limited

Example addresses in this block

00:17:7D:00:00:00 00:17:7D:7F:FF:FF 00:17:7D:FF:FF:FF

Where this block sits

Previous 00:17:7C:00:00:00 /24 Smartlink Network Systems Limited Next 00:17:7E:00:00:00 /24 Meshcom Technologies Inc.

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

IDT Technology Limited holds 2 registered blocks in the IEEE registry, ranking #2,234 of 33,421 organizations by block count.

Other blocks registered to IDT Technology Limited

98:F8:C1:00:00:00 /24 MA-L