How can I find a list of the assigned letter designations for each underground utililty operator.

Each utility owner has been assigned specific letter designations that are to be used to identify the paint marks at the jobsite.
Click here to see the list of assigned letter designations.

When using this page you can view the list of codes or search for the “Company” or the “Marking Code” using the quick search option. Click the “Show All” link to display the entire list. You can sort the list in either Ascending or Descending order by “Company” or “Marking Code” by clicking on the appropriate column header.