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:75:70:00:00 /28
Vendor address1F., No. 50, Ln. 148, Lide St. Zhonghe Dist. New Taipei City TW 23512
Country🇹🇼 Taiwan
RegisteredDec 3, 2025
Block range5C:5C:75:70:00:00– 5C:5C:75:7F: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
Where this block sits
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5C:5C:75:60:00:00 /28
Ebet Systems
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5C:5C:75:80:00:00 /28
hassoun Gulf Industrial Company
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
UOI TECHNOLOGY CORPORATION holds 2 registered blocks in the IEEE registry, ranking #3,335 of 33,427 organizations by block count.
Other blocks registered to UOI TECHNOLOGY CORPORATION