<td class="X c-af">africa
<td class="X c-eu">europe
<td class="X c-as">asia
- <td class="X c-aa">antarctica
+ <td class="X c-an">antarctica
<td class="X c-oc">oceania
<td class="X c-sa">south america
<td class="X c-na">north america
<td class="Xr">reserved
<td class="">free
+ <td class="X Xi">unused
<td class="X Co">user-assigned
</table>