macadress

Arista Networks

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:1C:73:00:00:00 /24
Vendor address5470 Great America Pkwy Santa Clara US 95054
Country🇺🇸  United States
RegisteredMay 13, 2007
Block range00:1C:73:00:00:00– 00:1C:73: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

  1. May 13, 2007 – Jun 23, 2009 Arastra, Inc. name changedaddress changed
  2. Jun 23, 2009 – Jul 20, 2017 Arista Networks, Inc. name changedaddress changed
  3. Jul 20, 2017 – present Arista Networks

Example addresses in this block

00:1C:73:00:00:00 00:1C:73:7F:FF:FF 00:1C:73:FF:FF:FF

Where this block sits

Previous 00:1C:72:00:00:00 /24 Mayer & Cie GmbH & Co KG Next 00:1C:74:00:00:00 /24 Syswan Technologies Inc.

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

Arista Networks holds 51 registered blocks in the IEEE registry, ranking #69 of 33,427 organizations by block count.

Other blocks registered to Arista Networks

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 58:D4:69:00:00:00 /24 MA-L