You just need two things to get started: your account number, which you can find on a paper copy of your bill, and your billing zip code.
Sometimes account activities such as moving or service changes can cause your account number to change. However, it's no problem to view and manage multiple accounts in My CenturyLink. You simply need to add the new account number to My CenturyLink.
To add a new account to an existing My CenturyLink profile, go ahead and sign in to My CenturyLink with your current username and password. Then select "Add Account" from the account drop-down menu in the top right corner.
Or, you can request your security code by clicking above or by chatting with a service agent. You'll be able to choose to have it sent to you by email, phone or mail.