Siemens AG

Siemens AG , manages 23 unique MAC address prefixes. These prefixes have a total block size of 353.4 million addresses.

The allocation includes the following types: MA-L(Mac Address Block Large, 16,777,216 addresses each), MA-M(Mac Address Block Medium, 1,048,576 addresses each) and MA-S(Mac Address Block Small, previously named OUI-36, encompasses IAB assignments, 4,096 addresses each).

The company registered its MAC address allocation on 22 April 1998, and the most recent update was made on 17 August 2026. These allocations support network identification and communication globally.

Unique prefixes: 23

Block Size: 353374185 (353.37 M)

First registration: 22 April 1998

Last updated: 17 August 2026

Types

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

MA-M:Mac Address Block Medium. Number of address 2^20 (~1 Million)

MA-S:Mac Address Block Small (previously named OUI-36, encompasses IAB Assignments). Number of address 2^12 (4096)

MAC PrefixTypeRegistration Date
00:01:E3 MA-L2000-11-09
00:0B:A3 MA-L2003-02-07
00:0E:8C MA-L2004-02-12
00:1B:1B MA-L2007-01-16
08:00:06 MA-L1998-04-22
10:DF:FC MA-L2018-06-29
20:87:56 MA-L2016-04-06
20:A8:B9 MA-L2016-07-14
28:63:36 MA-L2013-12-13
30:2F:1E MA-L2023-04-06
30:B8:51 MA-L2023-09-20
38:4B:24 MA-L2021-09-11
3C:FF:E4 MA-L2026-08-17
40:EC:F8 MA-L2010-01-05
70:B3:D5:C8:7 MA-S2015-04-29
74:FC:45 MA-L2025-01-02
88:3F:99 MA-L2018-04-13
A8:6D:04 MA-L2025-05-29
AC:64:17 MA-L2017-09-06
D0:EB:1A MA-L2026-08-03
D4:F5:27 MA-L2018-12-20
EC:1C:5D MA-L2021-06-29
F0:40:AF:A MA-M2025-09-19