Ksenia Security srl

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.

PrefixA4:58:0F:90:00:00 /28

Vendor addressSP Valtesino 44 Ripatransone AP IT 63065

RegisteredSep 4, 2016

Block rangeA4:58:0F:90:00:00– A4:58:0F:9F: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

A4:58:0F:90:00:00 A4:58:0F:97:FF:FF A4:58:0F:9F:FF:FF

Where this block sits

Previous A4:58:0F:80:00:00 /28 AIR LIQUIDE MEDICAL SYSTEMS Next A4:58:0F:A0:00:00 /28 GUANGZHOU OPTICAL BRIDGE COMMUNICATION EQUIPMENT CO.,LTD.

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

Ksenia Security srl holds 1 registered blocks in the IEEE registry, ranking #17,942 of 33,427 organizations by block count.