Unionbell Technologies Limited

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.

PrefixF0:40:AF:70:00:00 /28

Vendor addressCrown Court Estate, NO 11 DR Nwachukwu Nwanesi Street Durumi Abuja NG 900103

RegisteredSep 24, 2025

Block rangeF0:40:AF:70:00:00– F0:40:AF:7F: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

F0:40:AF:70:00:00 F0:40:AF:77:FF:FF F0:40:AF:7F:FF:FF

Where this block sits

Previous F0:40:AF:60:00:00 /28 Nepean Networks Pty Ltd Next F0:40:AF:80:00:00 /28 TargaSystem S.r.L.

The nearest registered blocks of the same size on either side of this one in IEEE's address space.

Unionbell Technologies Limited holds 1 registered blocks in the IEEE registry, ranking #30,960 of 33,427 organizations by block count.