HTML
MAC Address Vendor Assignments - HTML
MAC Address Vendor Assignments is an allocation system for network device identifiers managed by the IEEE Registration Authority. There are three block types: MA-L (formerly OUI), MA-M, and MA-S, with unique identifiers assigned to each vendor. This enables unique identification of network devices worldwide, used in Ethernet, Wi-Fi, Bluetooth, and other communications.
MAC address
OUI
IEEE
network
vendor identification
Ethernet
Wi-Fi
<table>
<thead><tr><th>code</th><th>slug</th><th>name</th><th>description</th><th>addressCount</th><th>eui48Support</th><th>eui64Support</th><th>ieeeAssignedBits</th><th>previousName</th></tr></thead>
<tbody><tr><td>MA-L</td><td>ma-l-mac-address-block-large</td><td>MA-L (MAC Address Block Large)</td><td>Large block of approximately 16 million addresses, equivalent to the traditional OUI.</td><td>~16,777,216 (2^24)</td><td>true</td><td>true</td><td>24</td><td>OUI (Organizationally Unique Identifier)</td></tr>
<tr><td>MA-M</td><td>ma-m-mac-address-block-medium</td><td>MA-M (MAC Address Block Medium)</td><td>Medium block of approximately 1 million addresses.</td><td>~1,048,576 (2^20)</td><td>true</td><td>true</td><td>28</td><td></td></tr>
<tr><td>MA-S</td><td>ma-s-mac-address-block-small</td><td>MA-S (MAC Address Block Small)</td><td>Small block of 4,096 addresses, equivalent to the traditional OUI-36.</td><td>4,096 (2^12)</td><td>true</td><td>true</td><td>36</td><td>OUI-36, IAB (Individual Address Block)</td></tr>
<tr><td>CID</td><td>cid-company-id</td><td>CID (Company ID)</td><td>24-bit identifier that cannot be used to generate MAC addresses.</td><td>N/A（MACアドレス生成不可）</td><td>false</td><td>false</td><td>24</td><td></td></tr></tbody>
</table>