YM
IEEE Registrant 50 Prefixes

YUYAMA MFG Co.,Ltd

www.yuyama.co.jp

YUYAMA MFG Co.,Ltd, accessible at www.yuyama.co.jp, manages 50 unique MAC address prefixes. These prefixes have a total block size of 204.8 thousand addresses.

The allocation includes the following types: IAB(Individual Address Block) 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 21 February 2011, and the most recent update was made on 13 July 2026. These allocations support network identification and communication globally.

Unique prefixes 50
Block Size 204750 (204.75 k)
First registration 21 February 2011
Last updated 13 July 2026

Entity Details

Unique prefixes 50
Block Size 204750 (204.75 k)
Website www.yuyama.co.jp
First registration 21 February 2011
Last updated 13 July 2026

Types

IAB: Block Type

Individual Address Blocks. Number of address 2^24 (~16 Million)

MA-S: Block Type

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

Registered MAC Prefixes

All Organizationally Unique Identifiers and MAC ranges assigned to this vendor

50 Records
MAC PrefixTypeRegistration Date
00:50:C2:39:B IAB2011-02-21
00:50:C2:A2:E IAB2011-02-21
00:50:C2:EE:C IAB2011-12-14
40:D8:55:0F:F IAB2013-06-03
70:B3:D5:15:0 MA-S2018-12-28
70:B3:D5:19:6 MA-S2020-12-29
70:B3:D5:1F:2 MA-S2019-12-24
70:B3:D5:2D:E MA-S2018-10-24
70:B3:D5:5C:8 MA-S2014-11-04
70:B3:D5:74:2 MA-S2016-02-18
70:B3:D5:85:F MA-S2018-06-14
70:B3:D5:9C:7 MA-S2016-10-11
70:B3:D5:B2:2 MA-S2020-07-24
70:B3:D5:B6:A MA-S2017-03-08
70:B3:D5:BB:B MA-S2019-06-22
70:B3:D5:BD:4 MA-S2019-02-12
70:B3:D5:C2:B MA-S2019-12-31
70:B3:D5:CA:D MA-S2020-12-19
70:B3:D5:CB:A MA-S2018-10-24
70:B3:D5:D0:6 MA-S2020-06-03
70:B3:D5:DB:4 MA-S2016-02-18
70:B3:D5:E8:6 MA-S2017-10-28
8C:1F:64:03:E MA-S2026-04-01
8C:1F:64:12:D MA-S2024-06-11
8C:1F:64:24:E MA-S2025-07-11
8C:1F:64:2A:4 MA-S2024-02-14
8C:1F:64:2C:6 MA-S2022-08-31
8C:1F:64:32:9 MA-S2022-12-28
8C:1F:64:35:7 MA-S2025-04-07
8C:1F:64:49:8 MA-S2021-10-23
8C:1F:64:5A:C MA-S2022-04-05
8C:1F:64:5C:F MA-S2025-11-21
8C:1F:64:65:A MA-S2025-10-21
8C:1F:64:70:A MA-S2025-08-25
8C:1F:64:8B:E MA-S2025-02-10
8C:1F:64:8C:A MA-S2024-08-23
8C:1F:64:90:6 MA-S2026-05-19
8C:1F:64:9F:5 MA-S2023-03-08
8C:1F:64:A4:A MA-S2024-12-09
8C:1F:64:A6:2 MA-S2026-07-13
8C:1F:64:AD:2 MA-S2021-08-04
8C:1F:64:AE:1 MA-S2021-05-28
8C:1F:64:B5:A MA-S2023-07-07
8C:1F:64:C5:E MA-S2024-05-03
8C:1F:64:CF:A MA-S2022-10-19
8C:1F:64:CF:B MA-S2023-07-24
8C:1F:64:D4:2 MA-S2023-01-27
8C:1F:64:EA:F MA-S2026-02-02
8C:1F:64:F6:8 MA-S2023-12-15
8C:1F:64:F7:9 MA-S2022-12-20