Siemens Numerical Control Ltd., Nanjing (E8:EF:22:00:00:00 /24)

Siemens Numerical Control Ltd., Nanjing MA-L

MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.

PrefixE8:EF:22:00:00:00 /24

Vendor address18 Runhuai Road, Lishui Zone Nanjing CN 211200

Block rangeE8:EF:22:00:00:00– E8:EF:22:FF:FF:FF

Address capacity16,777,216

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

E8:EF:22:00:00:00 E8:EF:22:7F:FF:FF E8:EF:22:FF:FF:FF

Other blocks registered to Siemens Numerical Control Ltd., Nanjing

00:1C:06:00:00:00 /24 MA-L