Shenzhen Longsys Electronics Co.,Ltd.
CID
CID: a Company ID, not a MAC OUI. It identifies an organization for use in other IEEE 802 protocols, most commonly locally administered ELI-quadrant addresses, rather than being burned into hardware directly.
Prefix3A:5A:27:00:00:00 /24
Vendor address8F, Building 1, Financial Base, No.8 Kefa Road, High-Tech Park, Shenzhen, China Shenzhen Guangdong CN 518000
Country🇨🇳 China
Block range3A:5A:27:00:00:00– 3A:5A:27:FF:FF:FF
Address capacity16,777,216
AdministrationLocally administered: set by software, not burned into hardware
TransmissionUnicast: addressed to a single device
IEEE 802c quadrantELI: Extended Local Identifier
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