You can find your account number at the bottom right corner of your OmniParcel page after successful login.
Site Name is your account Name. You would require to tell support person your site name at the time of support call or support email. Normally you can find your site name next to your username in the bottom left corner of your OmniParcel Page after successful login.
Yes, you can check your tracking report of all your OmniParcel accounts together. You just need to make sure all your accounts are grouped together. If you are not seeing all your accounts, please contact our helpdesk.