MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
SC
IEEE Registrant 4 Prefixes
S.E.I. CO.,LTD.
S.E.I. CO.,LTD. manages 4 unique MAC address prefixes. These prefixes have a total block size of 16.4 thousand addresses.
The allocation includes the following types: 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 18 April 2017, and the most recent update was made on 27 June 2025. These allocations support network identification and communication globally.
Unique prefixes 4
Block Size 16380 (16.38 k)
First registration 18 April 2017
Last updated 27 June 2025
Entity Details
Unique prefixes 4
Block Size 16380 (16.38 k)
First registration 18 April 2017
Last updated 27 June 2025
Types
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
| MAC Prefix | Type | Registration Date |
|---|---|---|
| 70:B3:D5:12:D | MA-S | 2019-10-04 |
| 70:B3:D5:56:B | MA-S | 2017-04-18 |
| 8C:1F:64:65:5 | MA-S | 2021-11-20 |
| 8C:1F:64:C0:9 | MA-S | 2025-06-27 |