Here is how to get your AT&T Landline account number and transfer PIN, and what to do with them when you move your number to another carrier.
Account Number
For AT&T landline accounts, your account # is the 10-digit phone number.
Transfer PIN
The PIN is the 4 digits to the immediate right of the phone number in the top right corner of your bill.
*#06# for your IMEI and check it first.AT&T Landline Contact Info
Customer Service: 1-800-331-0500
Hours: Monday – Saturday: 9:00AM – 6:00PM | Sunday: CLOSED | Tech Support: 24/7
What network does AT&T Landline use?
AT&T Landline runs on the AT&T network.
AT&T Landline Porting Instructions
For AT&T landline accounts, your account # is the 10-digit phone number. The PIN is the 4 digits to the immediate right of the phone number in the top right corner of your bill.
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Check coverage before you port
AT&T Landline runs on the AT&T network, so the coverage you get at your address is AT&T coverage. Check it on AT&T’s own coverage map before you start the transfer.
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 AT&T Landline transfer PIN lookup puts these steps on one screen and texts them to the customer.
Where AT&T Landline customers usually go next
AT&T Landline runs on AT&T’s network, so the phone in your hand is already AT&T-compatible. These carriers will take it with no compatibility question.
Cricket WirelessAT&T network, prepaid
H2O WirelessAT&T network, prepaid
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Questions about AT&T Landline
Can I keep my phone number when I leave AT&T Landline?
Yes. Federal number portability rules let you take a working number to a new carrier. AT&T Landline cannot refuse the transfer or charge you to release the number.
Should I cancel AT&T Landline before I port my number out?
No. Cancel first and the number is released, which ends your right to move it. Keep the AT&T Landline line active until the new carrier confirms the port completed.
How long does a port out from AT&T Landline take?
A simple wireless transfer usually completes within one business day once the new carrier submits the correct AT&T Landline account number and transfer PIN.
Does AT&T Landline run on its own towers?
No. AT&T Landline is a reseller riding on the AT&T network.
Does AT&T Landline charge a fee to release my number?
No. A carrier cannot bill you for porting a number out. You may still owe a final bill or an unpaid device balance, and that is separate from the transfer itself.
What happens if the AT&T Landline account number is wrong?
The port request is rejected and the new carrier resubmits it. The number stays on AT&T Landline in the meantime, so nothing is lost — it only costs time.
Cite this page
Port-out details last confirmed with AT&T Landline on 2 October 2026.
Best Cellular. “AT&T Landline Account Number & PIN: Accurate 2026,” BestCellular.com. https://bestcellular.com/att-landline/
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Check AT&T Landline before you switch
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Other carriers on the AT&T network
These brands use the same towers as AT&T Landline. Coverage is the same. Price, data priority when the network is busy, and customer service are not.
See which network every US carrier uses · Open the transfer PIN lookup