SHANGHAI CHENZHU INSTRUMENT CO., LTD.
MA-M
MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix04:EC:A9:60:00:00 /28
Vendor addressBuilding 6, 201 Minyi Road, Songjiang District Shanghai CN 201612
Country🇨🇳 China
Block range04:EC:A9:60:00:00– 04:EC:A9:6F:FF:FF
Address capacity1,048,576
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
Other blocks registered to SHANGHAI CHENZHU INSTRUMENT CO., LTD.