Try block for One Time Passcodes via APM

I believe that stripping out the dashes is something you can easily accomplish using a regular expression and a variable assign.

 

The Second part of your question seems like it needs a bit more clarification. How are you planning to "try that phone number against X number of choices" sending each of the carriers an e-mail addressed to that phone number?

 

I would personally look into a SIP broker ENUM lookup service and a HTTP sideband iRule. I did a quick google and here is an example of a sipbroker ENUM lookup service:

 

http://www.sipbroker.com/sipbroker/action/webServices