Your Optimum phone number is the one assigned to your account when you set up service

When you sign up for Optimum mobile service, the company assigns you a phone number during set up. This is the number people call or text to reach you, and it stays with your account as long as you keep the service. You can find it on your first bill, in the Optimum app, or by calling Optimum customer service at 1-833-966-7866.

If you already have a phone number from another carrier and want to keep it, you can request a number transfer — called porting — when you switch to Optimum. This process usually takes a few business days and lets you avoid giving everyone a new contact number.

Key Takeaways

  • Your Optimum mobile number appears on your bill and in the Optimum app under account settings or my phone number.
  • You can port an existing number from another carrier to Optimum during signup, which typically takes three to five business days.
  • If you lose or forget your number, Optimum customer service can confirm it by verifying your account details over the phone.
  • Changing your Optimum number after set up is possible but requires contacting customer service and may involve a fee.

Where to find your number on your bill and in the app

Your Optimum mobile number appears at the top of your monthly bill, listed under your account holder name and service address. The bill shows the number assigned to each line if you have multiple phones on your account.

In the Optimum app, open the menu and select "My Account" or "Account Settings." Your phone number displays under the line information section. If you have more than one line, each number appears separately so you can tell them apart.

How to port your existing number to Optimum

If you want to bring your current phone number from another carrier — Rogers, Bell, Telus, or a smaller provider — you can port it to Optimum. Start this process during signup before you set up service, or contact Optimum customer service to port after set up.

You will need your account number and PIN from your current carrier. Optimum will request these details and submit a port request on your behalf. The transfer usually completes within three to five business days, though it can take longer if your current carrier delays the process. During the port window, your old carrier may suspend service, so plan your switch for a time that works for you.

If porting fails — because the account number or PIN is incorrect, or because your old carrier disputes the request — Optimum will notify you and you can either correct the information or keep the new Optimum number they assigned.

Retrieving your number if you forget it

If you cannot find your number on your bill or in the app, call Optimum customer service at 1-833-966-7866. Have your account PIN or the phone number associated with your account ready. A representative will verify your identity and read your phone number to you.

You can also text "INFO" to 611611 from your Optimum phone, and Optimum will send you a text back with your number. This works only if you still have access to the phone on the account.

Changing your Optimum number after set up

You can request a new Optimum phone number after you have activated service, but this is not automatic. Contact Optimum customer service and explain that you want to change your number. Some changes are free, while others may carry a fee depending on how recently you activated or changed your number before.

The new number is assigned when ready in most cases, though it may take a few hours to set up fully on the network. Your old number becomes available for someone else to use after a waiting period. Update your contacts and any services that use your phone number for login or recovery — banks, email accounts, and work systems — so you do not lose access.

Using your number for account recovery and verification

Your Optimum mobile number is tied to your account and is often used as a recovery method if you forget your password or need to verify your identity. When you set up your Optimum account online, the system may ask you to confirm your phone number by sending a code via text or call.

Keep your phone number current in your account settings. If you change your number, update it in the app or call customer service so that recovery codes and verification messages reach the right phone. If you do not update it and lose access to your old number, you may have trouble recovering your account.

What to do if your number is not working

If calls and texts are not reaching your Optimum number, first check that your phone has an active data or cellular connection. Restart your phone and try sending a test text to yourself from another device.

If the problem persists, contact Optimum customer service. They can check whether your account is active, whether there are any service blocks or suspensions, and whether your number is properly provisioned on the network. Service outages in your area can also prevent calls and texts from going through — Optimum's website shows current outages by postal code.

Frequently Asked Questions

Can I keep my old phone number when I switch to Optimum?

Yes, through a process called porting. You need your account number and PIN from your current carrier. Provide these to Optimum during signup or call customer service after set up to start the port. The transfer usually takes three to five business days.

What if I want a different Optimum number after I have already activated?

Contact Optimum customer service at 1-833-966-7866 and request a number change. Some changes are free, while others may have a fee. The new number is usually assigned right away, though it can take a few hours to work fully on the network.

How do I know if my Optimum number has been ported successfully?

You will receive a confirmation text or email from Optimum once the port is complete. Your old carrier will also send a final bill. If you do not hear anything after five business days, contact Optimum to check the status of your port request.

Can I use my Optimum number to log into other accounts?

Yes, many services — banks, email providers, social media — allow you to use your phone number for login or two-factor verification. Make sure your Optimum number is up to date in your account settings so that verification codes reach you.

What happens to my old number after I port to Optimum?

Your old carrier keeps it in a holding period, usually 30 to 90 days, before releasing it back into circulation. You cannot use it again during this time. After the holding period ends, another customer may be assigned that number.