MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixEC:58:65:00:00:00 /24
Vendor address17B, Jinson Building, Tairan 4th Road, Shatou Subdistrict, Futian District Shenzhen Guangdong CN 518048
Country🇨🇳 China
RegisteredJan 23, 2026
Block rangeEC:58:65:00:00:00– EC:58:65: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
Shenzhen Xinguodu Technology Co., Ltd. holds 3 registered blocks in the IEEE registry, ranking #1,304 of 33,427 organizations by block count.