MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixEC:5B:71:00:00:00 /24
Vendor addressNo.66 West District 2nd Rd, Shapingba District Chongqing Chongqing CN 401331
Country🇨🇳 China
RegisteredNov 10, 2025
Block rangeEC:5B:71:00:00:00– EC:5B:71: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
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Inventec(Chongqing) Corporation holds 3 registered blocks in the IEEE registry, ranking #1,122 of 33,427 organizations by block count.
Other blocks registered to Inventec(Chongqing) Corporation