Shanghai Dabuziduo Information and Technology 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.

PrefixCC:E7:DE:70:00:00 /28

Vendor address#818, #298 Guoxia Rd, Yangpu Dist Shanghai Shanghai CN 200000

RegisteredMar 31, 2026

Block rangeCC:E7:DE:70:00:00– CC:E7:DE:7F: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

CC:E7:DE:70:00:00 CC:E7:DE:77:FF:FF CC:E7:DE:7F:FF:FF

Where this block sits

Previous CC:E7:DE:60:00:00 /28 Skylight Next CC:E7:DE:90:00:00 /28 Shenzhen Qichang Intelligent Technology Co., Ltd.

The nearest registered blocks of the same size on either side of this one in IEEE's address space.

Shanghai Dabuziduo Information and Technology Co., Ltd. holds 1 registered blocks in the IEEE registry, ranking #25,904 of 33,427 organizations by block count.