MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix3C:B1:7F:00:00:00 /24
Vendor address22 Woodbury Rd St. Ives Sydney NSW AU 2075
Country🇦🇺 Australia
RegisteredNov 21, 2009
Block range3C:B1:7F:00:00:00– 3C:B1:7F: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 →
Example addresses in this block
Where this block sits
Wattwatchers Pty Ld holds 1 registered blocks in the IEEE registry, ranking #31,943 of 33,427 organizations by block count.