Center for E-Commerce Infrastructure Development, The University of Hong Kong

MA-S

MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.

Prefix00:1B:C5:07:10:00 /36

Vendor addressRoom 301, Chow Yei Ching Building, HK

RegisteredMar 31, 2013

Block range00:1B:C5:07:10:00– 00:1B:C5:07:1F:FF

Address capacity4,096

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 →

Example addresses in this block

00:1B:C5:07:10:00 00:1B:C5:07:17:FF 00:1B:C5:07:1F:FF

Where this block sits

Previous 00:1B:C5:07:00:00 /36 Siemens Industries, Inc, Retail & Commercial Systems Next 00:1B:C5:07:20:00 /36 Ohio Semitronics, Inc.

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

Center for E-Commerce Infrastructure Development, The University of Hong Kong holds 1 registered blocks in the IEEE registry, ranking #8,038 of 33,421 organizations by block count.