CCH Technology & intelligence 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:A9:50:00:00 /28

Vendor addressBuilding 3, No.628 Guagang 1st Road, Guali Town, Xiaoshan District, Hangzhou City, Zhejiang Province, P.R.China HangZhou ZheJiang CN 311241

Country🇨🇳 China

RegisteredAug 25, 2026

Block range04:EC:A9:50:00:00– 04:EC:A9:5F: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

04:EC:A9:50:00:00 04:EC:A9:57:FF:FF 04:EC:A9:5F:FF:FF

Where this block sits

Previous 04:EC:A9:40:00:00 /28 Shanghai Vic Lab Intelligent Technology Co.,Ltd. Next 04:EC:A9:60:00:00 /28 SHANGHAI CHENZHU INSTRUMENT CO., LTD.

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

CCH Technology & intelligence Co., Ltd. holds 1 registered blocks in the IEEE registry, ranking #7,951 of 33,498 organizations by block count.