Weihai Hualing Opto-electronics Co., Ltd. (24:A3:F0:80:00:00 /28)

Weihai Hualing Opto-electronics 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.

Prefix24:A3:F0:80:00:00 /28

Vendor addressNo. 179, Keji Road, Hi-Tech. IDZ Weihai Shandong CN 246209

Block range24:A3:F0:80:00:00– 24:A3:F0:8F: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

24:A3:F0:80:00:00 24:A3:F0:87:FF:FF 24:A3:F0:8F:FF:FF