De Haardt bv (7C:E4:A1:20:00:00 /28)

De Haardt bv 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.

Prefix7C:E4:A1:20:00:00 /28

Vendor addressMarithaime 6 Elst NL 6662 WD

Block range7C:E4:A1:20:00:00– 7C:E4:A1:2F: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

7C:E4:A1:20:00:00 7C:E4:A1:27:FF:FF 7C:E4:A1:2F:FF:FF

Other blocks registered to De Haardt bv

70:B3:D5:CA:20:00 /36 MA-S