MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix5C:5C:75:40:00:00 /28
Vendor addressNo.11 xingyung street chungli dist taoyuan city Taoyuan TW 320
Country🇹🇼 Taiwan
RegisteredNov 26, 2025
Block range5C:5C:75:40:00:00– 5C:5C:75:4F: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
Where this block sits
Previous
5C:5C:75:30:00:00 /28
O-cubes Shanghai Microelectronics Technology Co., Ltd
Next
5C:5C:75:50:00:00 /28
YingKeSong Pen Industry Technology R&D Center Shenzhen Co Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Bkeen International Corporated holds 1 registered blocks in the IEEE registry, ranking #7,077 of 33,427 organizations by block count.