JOYAR TECHNOLOGY (HONG KONG) COMPANY LIMITED

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.

PrefixA4:4F:3E:C0:00:00 /28

Vendor addressFLAT/RM 1610, 16/F, SEAPOWER TOWER CONCORDIA PLAZA,1 SCIENCE MUSEUM ROAD, TSIM SHA TSUI, KOWLOON, HONG KONG HONG KONG HK 999077

Country🇭🇰 Hong Kong

RegisteredApr 18, 2026

Block rangeA4:4F:3E:C0:00:00– A4:4F:3E:CF: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

A4:4F:3E:C0:00:00 A4:4F:3E:C7:FF:FF A4:4F:3E:CF:FF:FF

Where this block sits

Previous A4:4F:3E:B0:00:00 /28 Suzhou AIDomex Intelligent Technology Co., Ltd. Next A4:4F:3E:D0:00:00 /28 NTT sonority, Inc.

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

JOYAR TECHNOLOGY (HONG KONG) COMPANY LIMITED holds 1 registered blocks in the IEEE registry, ranking #17,282 of 33,427 organizations by block count.