MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixB8:F4:53:70:00:00 /28
Vendor addressNa Groši 1344/5a Praha 10 CZ 102 00
Country🇨🇿 Czechia
Block rangeB8:F4:53:70:00:00– B8:F4:53:7F: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
Where this block sits
Previous
B8:F4:53:40:00:00 /28
Ontic Engineering & Manufacturing
Next
B8:F4:53:80:00:00 /28
ViewSonic Corp
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Valthor, s.r.o. holds 1 registered blocks in the IEEE registry, ranking #31,269 of 33,498 organizations by block count.