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
Country🇪🇸 Spain
RegisteredMar 3, 2023
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 →
Ownership timeline
- Mar 3, 2023 – Mar 9, 2023 AD HOC DEVELOPMENTS S.L. name changed
- Mar 9, 2023 – present AD HOC DEVELOPMENTS S.L
Example addresses in this block
Where this block sits
Previous
B4:4D:43:80:00:00 /28
ShenZhen Launch-Wonder Technology co., LTD
Next
B4:4D:43:A0:00:00 /28
UAV Navigation
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
AD HOC DEVELOPMENTS S.L holds 2 registered blocks in the IEEE registry, ranking #1,443 of 33,421 organizations by block count.
Other blocks registered to AD HOC DEVELOPMENTS S.L