XML

MAC Address Vendor Assignments - XML

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

<?xml version="1.0" encoding="UTF-8"?>
<items>
  <item>
    <code>MA-L</code>
    <slug>ma-l-mac-address-block-large</slug>
    <name>MA-L (MAC Address Block Large)</name>
    <description>Large block of approximately 16 million addresses, equivalent to the traditional OUI.</description>
    <addressCount>~16,777,216 (2^24)</addressCount>
    <eui48Support>true</eui48Support>
    <eui64Support>true</eui64Support>
    <ieeeAssignedBits>24</ieeeAssignedBits>
    <previousName>OUI (Organizationally Unique Identifier)</previousName>
  </item>
  <item>
    <code>MA-M</code>
    <slug>ma-m-mac-address-block-medium</slug>
    <name>MA-M (MAC Address Block Medium)</name>
    <description>Medium block of approximately 1 million addresses.</description>
    <addressCount>~1,048,576 (2^20)</addressCount>
    <eui48Support>true</eui48Support>
    <eui64Support>true</eui64Support>
    <ieeeAssignedBits>28</ieeeAssignedBits>
    <previousName></previousName>
  </item>
  <item>
    <code>MA-S</code>
    <slug>ma-s-mac-address-block-small</slug>
    <name>MA-S (MAC Address Block Small)</name>
    <description>Small block of 4,096 addresses, equivalent to the traditional OUI-36.</description>
    <addressCount>4,096 (2^12)</addressCount>
    <eui48Support>true</eui48Support>
    <eui64Support>true</eui64Support>
    <ieeeAssignedBits>36</ieeeAssignedBits>
    <previousName>OUI-36, IAB (Individual Address Block)</previousName>
  </item>
  <item>
    <code>CID</code>
    <slug>cid-company-id</slug>
    <name>CID (Company ID)</name>
    <description>24-bit identifier that cannot be used to generate MAC addresses.</description>
    <addressCount>N/A（MACアドレス生成不可）</addressCount>
    <eui48Support>false</eui48Support>
    <eui64Support>false</eui64Support>
    <ieeeAssignedBits>24</ieeeAssignedBits>
    <previousName></previousName>
  </item>
</items>