Cisco Systems, Inc

MA-L

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

Prefix5C:71:0D:00:00:00 /24

Vendor address80 West Tasman Dr. San Jose CA US 94568

RegisteredAug 9, 2019

Block range5C:71:0D:00:00:00– 5C:71:0D: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 →

Ownership timeline

Aug 9, 2019 – Aug 10, 2019 Cisco Systems name changed
Aug 10, 2019 – present Cisco Systems, Inc

Example addresses in this block

5C:71:0D:00:00:00 5C:71:0D:7F:FF:FF 5C:71:0D:FF:FF:FF

Where this block sits

Cisco Systems, Inc holds 1,258 registered blocks in the IEEE registry, ranking #3 of 33,427 organizations by block count.

Other blocks registered to Cisco Systems, Inc

00:00:0C:00:00:00 /24 MA-L 00:01:42:00:00:00 /24 MA-L 00:01:43:00:00:00 /24 MA-L 00:01:63:00:00:00 /24 MA-L 00:01:64:00:00:00 /24 MA-L 00:01:96:00:00:00 /24 MA-L 00:01:97:00:00:00 /24 MA-L 00:01:C7:00:00:00 /24 MA-L 00:01:C9:00:00:00 /24 MA-L 00:02:16:00:00:00 /24 MA-L 00:02:17:00:00:00 /24 MA-L 00:02:3D:00:00:00 /24 MA-L