Shanghai Cygnus Semiconductor Co., Ltd.
MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixD4:7B:6B:00:00:00 /24
Vendor addressRooms 401 and 402, Building 5, 690 Bibo Road, China (Shanghai) Pilot Free Trade Zone Shanghai Shanghai CN 201203
Country🇨🇳 China
Block rangeD4:7B:6B:00:00:00– D4:7B:6B: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