MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix6C:83:66:00:00:00 /24
Vendor addressNo.11 Phoenix Road Nanjing Jiangsu Provience CN 211100
Country🇨🇳 China
RegisteredAug 1, 2013
Block range6C:83:66:00:00:00– 6C:83:66: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
Nanjing SAC Power Grid Automation Co., Ltd. holds 3 registered blocks in the IEEE registry, ranking #1,192 of 33,427 organizations by block count.
Other blocks registered to Nanjing SAC Power Grid Automation Co., Ltd.