MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:18:0C:00:00:00 /24
Vendor address22A-1051 Baxter Road Ottawa Ontario CA K2C 3P2
Country🇨🇦 Canada
RegisteredApr 21, 2006
Block range00:18:0C:00:00:00– 00:18:0C: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
- Apr 21, 2006 – Oct 22, 2007 Optelian Access Networks Corporation name changedaddress changed
- Oct 22, 2007 – Dec 16, 2022 Optelian Access Networks name changed
- Dec 16, 2022 – Dec 18, 2022 DZS California Inc. name changed
- Dec 18, 2022 – Jul 29, 2025 DZS Inc. name changed
- Jul 29, 2025 – present Zhone Technologies, Inc.
Example addresses in this block
Where this block sits
Previous
00:18:0B:00:00:00 /24
Brilliant Telecommunications
Next
00:18:0D:00:00:00 /24
Terabytes Server Storage Tech Corp
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Zhone Technologies, Inc. holds 12 registered blocks in the IEEE registry, ranking #269 of 33,427 organizations by block count.
Other blocks registered to Zhone Technologies, Inc.