MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix8C:1F:64:F8:00:00 /36
Vendor addressDinh Vu - Cat Hai Economic Zone, Cai Hai Island, Cat Hai Sepcial Administrative Zone Hai Phong Hai Phong VN 180000
Country🇻🇳 Vietnam
RegisteredAug 28, 2025
Block range8C:1F:64:F8:00:00– 8C:1F:64:F8:0F:FF
Address capacity4,096
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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8C:1F:64:F7:F0:00 /36
Vision Systems Safety Tech
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8C:1F:64:F8:20:00 /36
SEORIM TECHNOLOGY
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Vinfast Trading and Production JSC holds 3 registered blocks in the IEEE registry, ranking #1,383 of 33,421 organizations by block count.
Other blocks registered to Vinfast Trading and Production JSC