Transfer PIN for AT&T Landline

Read this topic to determine the PIN on a traditional landline (POTS). If you have AT&T Phone, digital landline, than you have to call to get the PIN. 

Thank you!  So simple but so hard to find an answer!  

Please clarify. I want to transfer my AT&T traditional landline phone number to my new Consumer Cellular Home Base. I need a transfer pin. My AT&T account number is nine digits. It is not my phone number. How do I obtain the transfer pin?

Please advise asap. Thanks.

If it's 9 digits you don't have a traditional landline, unless you have some kind of combined bill. A POTS line has a 10 digit phone number plus 3