MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:1C:EF:00:00:00 /24
Vendor address669, Ruey Kuang Road, Neihu Taipei TW 114
Country🇹🇼 Taiwan
RegisteredJun 16, 2007
Block range00:1C:EF:00:00:00– 00:1C:EF: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 16, 2007 – Apr 27, 2016 Primax Electronics LTD name changedaddress changed
- Apr 27, 2016 – present Primax Electronics Ltd.
Example addresses in this block
Where this block sits
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Primax Electronics Ltd. holds 5 registered blocks in the IEEE registry, ranking #624 of 33,421 organizations by block count.
Other blocks registered to Primax Electronics Ltd.