MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix80:40:05:00:00:00 /24
Vendor addressRoom 601 & 701, Bld. 2, No.2, Science and Technology 9 Rd, Songshan Lake Hi-Tech Zone, Dongguan 523808, Guandong, China Dongguan Guangdong CN 523808
Country🇨🇳 China
RegisteredJun 17, 2025
Block range80:40:05:00:00:00– 80:40:05: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.
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Example addresses in this block
Where this block sits
Guangdong COROS Sports Technology Co., Ltd holds 2 registered blocks in the IEEE registry, ranking #2,124 of 33,427 organizations by block count.