Connection Card Assigned Card Numbers
Connection Card Pro gives you assigned card numbers to use when you use plastic cards (or paper) for your Check-In, Earning Credits, Library check-in/out, etc.
For your cards to work properly, you must use the numbers within the number range given to you.
Click on your Profile Image in the top right corner > Account Settings.
Under your Current Plan / Add-Ons you will see Card Numbers with your assigned Card numbers listed.