MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:12:9F:00:00:00 /24
Vendor address3775 North First Street San Jose CA US 95134
Country🇺🇸 United States
RegisteredOct 16, 2004
Block range00:12:9F:00:00:00– 00:12:9F: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
- Oct 16, 2004 – Feb 22, 2012 RAE Systems, Inc. name changedaddress changed
- Feb 22, 2012 – present RAE Systems
Example addresses in this block
Where this block sits
Previous
00:12:9E:00:00:00 /24
Surf Communications Inc.
Next
00:12:A0:00:00:00 /24
NeoMeridian Sdn Bhd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
RAE Systems holds 1 registered blocks in the IEEE registry, ranking #24,129 of 33,427 organizations by block count.