MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixCC:F7:22:C0:00:00 /28
Vendor addressWalnut Medical Private Limited, Plot No. 132, JLPL Industrial Park Sector 82, SAS Nagar (Mohali), Punjab - Mohali Punjab IN 160055
Block rangeCC:F7:22:C0:00:00– CC:F7:22:CF: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

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

Walnut Medical Private Limited holds 1 registered blocks in the IEEE registry, ranking #31,952 of 33,498 organizations by block count.