AD HOC DEVELOPMENTS S.L (B4:4D:43:90:00:00 /28)

AD HOC DEVELOPMENTS S.L 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.

PrefixB4:4D:43:90:00:00 /28

Vendor addressC/ Mariano Barbacid, 5. 3ª planta Rivas Vaciamadrid Madrid ES 28521

Block rangeB4:4D:43:90:00:00– B4:4D:43:9F: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

B4:4D:43:90:00:00 B4:4D:43:97:FF:FF B4:4D:43:9F:FF:FF

Other blocks registered to AD HOC DEVELOPMENTS S.L

B0:B3:53:30:00:00 /28 MA-M