Ciena Corporation

Ciena Corporation , manages 32 unique MAC address prefixes. These prefixes have a total block size of 536.9 million addresses.

The allocation includes the following types: MA-L(Mac Address Block Large, 16,777,216 addresses each).

The company registered its MAC address allocation on 25 October 2008, and the most recent update was made on 16 October 2026. These allocations support network identification and communication globally.

Unique prefixes: 32

Block Size: 536870880 (536.87 M)

First registration: 25 October 2008

Last updated: 16 October 2026

Types

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

MAC PrefixTypeRegistration Date
00:23:8A MA-L2008-10-25
04:79:FD MA-L2023-11-07
14:4E:2A MA-L2018-10-13
14:AB:7E MA-L2026-10-16
18:92:A4 MA-L2019-09-21
1C:11:61 MA-L2017-10-11
20:80:58 MA-L2019-06-19
24:65:E1 MA-L2025-01-09
2C:39:C1 MA-L2014-02-25
2C:4A:11 MA-L2020-10-06
54:C3:3E MA-L2018-06-02
5C:07:A4 MA-L2023-11-07
74:87:BB MA-L2018-03-17
78:5F:A4 MA-L2025-10-08
78:D7:1A MA-L2020-07-09
84:8D:CE MA-L2022-06-16
90:DF:06 MA-L2026-02-11
94:43:4D MA-L2020-02-29
98:11:CC MA-L2025-10-08
9C:7A:03 MA-L2015-11-17
AC:89:D2 MA-L2022-12-13
C4:83:6F MA-L2016-10-15
C8:CA:79 MA-L2021-08-17
D0:19:6A MA-L2019-02-14
D4:39:B8 MA-L2020-10-14
D4:B7:D0 MA-L2021-08-04
D4:E4:C3 MA-L2024-12-16
E0:9B:27 MA-L2022-12-13
E4:6D:7F MA-L2022-06-16
E4:FE:E4 MA-L2026-02-11
EC:B0:E1 MA-L2017-08-11
F4:F0:32 MA-L2026-10-16