Hey VictorSMiller,
Thanks for the question. This can be done by viewing the contact info in Messages. Simply tap “Contact” in the top right corner, then tap the icon. This will bring up the contact card, and the number the message was sent to will be highlighted in blue.
View someone’s contact info in Messages.
To quickly view someone's contact info in Messages, tap Contact.
- Tap to call that person or to use FaceTime
- Tap to see the person’s complete contact info
If they're not already a contact, you can tap Create New Contact to add them.
Messages - Learn more about iOS 7 and iPhone - Apple Support
http://support.apple.com/kb/index?page=tidetail&product=iphone&locale=en_US&tag= Messages#TI136
Thanks,
Matt M.