This is a brief overview of Comcast and how to get the information you will need if you wish to port your phone number out to a different company. You can use the information below to get your Comcast account number and transfer PIN.
Comcast Contact Info
Customer Service: Must schedule a call online
Hours: After scheduling call online, an agent will call you when available.
Comcast Porting Instructions
Your Comcast account number is found on the top-right corner of each bill you receive, and there is one account number for each billing address. Your account number is created when you sign up for any Comcast service and does not change. Each XFINITY Voice account has a single four-digit Voice Security PIN that protects access to voice features online and over the phone. If you are a new customer, you should have received your Voice Security PIN via an automated phone call or by postal mail. Before you can access certain details about your voice service, including billing details, voice information, and voice features, you may be asked to provide your Voice Security PIN. Online, your account number is associated with XFINITY usernames for each person on your account. Each XFINITY username has a contact email address, a password and a secret question and answer (in case you lose your password). The primary XFINITY username is the main username for the account.
Xfinity is a TV, Internet and Phone provider for wire line communications. The instructions above will tell you how to get your Xfinity account information if you need to transfer your phone service to a different provider.
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Check coverage before you port
Xfinity Mobile runs on the Verizon network. Residential lines use the Verizon network; new business lines use T-Mobile under an agreement announced in July 2025. Comcast’s consumer material names only a “carrier partner,” but Comcast’s corporate newsroom and Charter’s SEC filings identify Verizon, and T-Mobile’s newsroom confirms the business arrangement. Xfinity Mobile is also Wi-Fi-first: most data rides Comcast’s Wi-Fi hotspots and hands off to the cellular network away from Wi-Fi. Check coverage on the network your line uses: Verizon or T-Mobile. Sources: Comcast, T-Mobile.
Your right to keep the number is federal, not a carrier policy. The rule is the FCC’s: Portability: Keeping Your Phone Number When Changing Service Providers.
Working a counter? The Comcast transfer PIN lookup puts these steps on one screen and texts them to the customer.
Where Comcast customers usually go next
Xfinity Mobile lines are Verizon-compatible, so Verizon itself and any other Verizon-based carrier will almost certainly take your phone. Check your IMEI against the new carrier’s compatible device list before you switch. Dial *#06# to get it.
T-MobileCheck your IMEI first
VerizonSame network, no compatibility risk
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Check Comcast before you switch
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Other carriers we track
Account numbers, transfer PINs and port-out steps for other carriers in the database.
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See which network every US carrier uses · Open the transfer PIN lookup