MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixC4:2C:7B:00:00:00 /24
Vendor addressHi-Tech Industrial Zone I, Hoa Lac Hi-Tech Park, Hoa Lac Commune Hanoi VN 100000
Country🇻🇳 Vietnam
RegisteredJan 22, 2026
Block rangeC4:2C:7B:00:00:00– C4:2C:7B:FF:FF:FF
Address capacity16,777,216
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.
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Example addresses in this block
Where this block sits
VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY holds 4 registered blocks in the IEEE registry, ranking #874 of 33,421 organizations by block count.
Other blocks registered to VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY