Arista Networks

MA-L

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

Prefix5C:16:C7:00:00:00 /24

Vendor address100 W Evelyn Mountain View CA US 94041

RegisteredMay 7, 2011

Block range5C:16:C7:00:00:00– 5C:16:C7: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

May 7, 2011 – Oct 24, 2021 Big Switch Networks name changed
Oct 24, 2021 – present Arista Networks

Dates show when a change became public in the IEEE registry. How we track ownership history →

Example addresses in this block

5C:16:C7:00:00:00 5C:16:C7:7F:FF:FF 5C:16:C7:FF:FF:FF

Where this block sits

Arista Networks holds 53 registered blocks in the IEEE registry, ranking #67 of 33,498 organizations by block count.

Other blocks registered to Arista Networks

00:1C:73:00:00:00 /24 MA-L 18:9C:E1:00:00:00 /24 MA-L 1C:8C:6E:00:00:00 /24 MA-L 28:99:3A:00:00:00 /24 MA-L 28:E7:1D:00:00:00 /24 MA-L 2C:DD:E9:00:00:00 /24 MA-L 38:2C:DB:00:00:00 /24 MA-L 38:38:A6:00:00:00 /24 MA-L 44:4C:A8:00:00:00 /24 MA-L 4C:09:97:00:00:00 /24 MA-L 50:45:D7:00:00:00 /24 MA-L 54:0F:2C:00:00:00 /24 MA-L