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:B0:00:00 /28
Vendor address500 Jackson St, Box 3005, Columbus, Indiana 47202-3005 Columbus IN US 47202-3005
Country🇺🇸 United States
RegisteredJul 23, 2026
Block range7C:E4:A1:B0:00:00– 7C:E4:A1:BF: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
Where this block sits
Previous
7C:E4:A1:A0:00:00 /28
SZ Zuvi Technology Co., Ltd.
Next
7C:E4:A1:C0:00:00 /28
Annapurna labs
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Cummins Inc holds 2 registered blocks in the IEEE registry, ranking #1,818 of 33,421 organizations by block count.
Other blocks registered to Cummins Inc