Arista Networks

Arista Networks accessible at www.arista.com, manages 41 unique MAC address prefixes. These prefixes are part of a massive allocation with a total block size of 687.9 million addresses.

The allocation includes the following types: MA-L (Mac Address Block Large, ~16 million addresses each).

The company registered its MAC address allocation on 13 May 2007, and the most recent update was made on 06 January 2026. These allocations support network identification and communication globally.

Unique prefixes: 41

Block Size: 687865815 (687.86 M)

www.arista.com

First registration: 13 May 2007

Last updated: 06 January 2026

Types

MA-L:Mac Address Block Large (previously named OUI). Number of address 2^24 (~16 Million)

MAC PrefixTypeRegistration Date
00:1C:73 MA-L2007-05-13
18:9C:E1 MA-L2025-03-21
28:99:3A MA-L2016-08-26
28:E7:1D MA-L2022-06-10
2C:DD:E9 MA-L2021-03-09
38:38:A6 MA-L2022-09-07
44:4C:A8 MA-L2015-11-17
4C:09:97 MA-L2026-01-06
54:0F:2C MA-L2024-08-08
5C:16:C7 MA-L2011-05-07
60:29:72 MA-L2025-11-06
68:BF:6C MA-L2024-05-09
6C:7A:63 MA-L2025-09-12
74:83:EF MA-L2017-07-23
78:5F:6C MA-L2025-01-21
88:F7:15 MA-L2025-01-21
8C:01:9D MA-L2025-04-25
94:8E:D3 MA-L2020-10-16
98:5D:82 MA-L2018-08-05
9C:69:ED MA-L2024-06-25
A4:7A:72 MA-L2025-03-03
A8:8F:99 MA-L2024-11-07
AC:3D:94 MA-L2023-01-13
B4:3A:96 MA-L2025-07-01
B8:58:FF MA-L2025-12-09
B8:A1:B8 MA-L2024-09-20
C0:69:11 MA-L2022-04-06
C0:D6:82 MA-L2019-11-20
C4:CA:2B MA-L2021-07-23
C8:08:8B MA-L2025-05-28
CC:1A:A3 MA-L2023-04-26
CC:E4:D1 MA-L2025-08-12
D4:AF:F7 MA-L2020-06-11
D8:06:F3 MA-L2024-12-04
E0:1C:A7 MA-L2024-05-02
E0:FA:5B MA-L2025-10-10
E4:78:76 MA-L2023-06-07
E8:AE:C5 MA-L2021-11-30
EC:8A:48 MA-L2022-11-08
FC:59:C0 MA-L2023-03-09
FC:BD:67 MA-L2019-03-18