Firm INFORMTEST Ltd. (A0:28:33:40:00:00 /28)

Firm INFORMTEST Ltd. 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.

PrefixA0:28:33:40:00:00 /28

Vendor addressAPT. 8, LODG. XIV ,FL.6, bld.4, Passage Savelkinsky Zelenograd Moscow RU 124482

Block rangeA0:28:33:40:00:00– A0:28:33:4F: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

A0:28:33:40:00:00 A0:28:33:47:FF:FF A0:28:33:4F:FF:FF