Once logged into HAC click on the Registration Icon
Next, click the Edit button in the Contacts section of the Registration window
Finally update your contact phone number and click the Save button after updating phone number you wish to change
The contacts numbers that are greyed out are phone numbers of other guardians or emergency contacts. If these numbers need updated as well the other guardian or emergency contact would need to sign into HAC and update their numbers as well.
If there are any questions or issues please contact IT Services