Go to https://cp.qis.net/cp (you may want to bookmark the link). Enter in the registered email account and password to log into your control panel. If you have forgotten your password, you can use the “Forgot your password?” link to reset it to the registered email account. Quantum does not keep these passwords on hand.
For all other questions or issues regarding the control panel, call us at 410-239-6920. If the current account holder is no longer in charge of the domain, call us to start a special process to switch the account holder.