MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixA4:44:D1:00:00:00 /24
Vendor addressFLAT/RM 1903 19/F PODIUM PLAZA 5HANOI ROAD TSIM SHA TSUI Hong Kong Hong Kong HK 999077
Country🇭🇰 Hong Kong
RegisteredNov 19, 2015
Block rangeA4:44:D1:00:00:00– A4:44:D1: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
Wingtech Group (HongKong）Limited holds 6 registered blocks in the IEEE registry, ranking #538 of 33,421 organizations by block count.
Other blocks registered to Wingtech Group (HongKong）Limited