How to separate part of a field

Hello Marketo Community!

In our CRM, we track phone numbers in two fields: Area Code and Phone Number. We are in the process of integrating our text messaging program with Vibes and are running into difficulty because Vibes maps their phone numbers with the Mobile Phone Number field, housing both the area code and the phone number in one field. Is it possible to separate the two, so we can have the area code in one field and the phone number in another? We've asked both Marketo and Vibes, and each is saying that they cannot do it from their end.

Thanks for the help!