MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:18:AA:00:00:00 /24
Vendor addressProtec House Nelson Lancashire GB BB9 6LQ
Country🇬🇧 United Kingdom
RegisteredJun 13, 2006
Block range00:18:AA:00:00:00– 00:18:AA: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
- Jun 13, 2006 – Jul 1, 2006 Protec Fire Detection plc name changedaddress changedcountry changed
- Jul 1, 2006 – Aug 18, 2007 Private name changedaddress changedcountry changed
- Aug 18, 2007 – present Protec Fire Detection plc
Example addresses in this block
Where this block sits
Previous
00:18:A9:00:00:00 /24
Ethernet Direct Corporation
Next
00:18:AB:00:00:00 /24
BEIJING LHWT MICROELECTRONICS INC.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Protec Fire Detection plc holds 2 registered blocks in the IEEE registry, ranking #2,779 of 33,427 organizations by block count.
Other blocks registered to Protec Fire Detection plc