The nine-digit account number references the ID CallRail assigns to your account when it is created. If you're associated with multiple CallRail accounts, you can include your account number when reaching out to our Support team with specific questions.
If you manage multiple accounts using CallRail's Account Center, you'll use these instructions once you're in an individual account.
In Account Settings
Select the Account icon in the top left to open the My Account panel. Your account number is the nine-digit number within the panel. 
On Your Invoice
Administrators can also see the account number alongside each invoice.
- Select the Account icon in the top left to open the My Account panel, then select Account Settings.
- Select Billing from the Manage header on the left.
- Find the invoice you'd like to see and select the invoice number within the All Invoices section.
- The account number associated with invoices in this account will display at the top of your receipt.