Thank you for posting your question. Personally, I think there's a bigger issue here than whether or not he is addicted to porn. Based on what you have written, he is addicted to sex. Being addicted to porn means he's watching porn excessively but he not only does this you have also found phone numbers and e-mails to other women. Are you okay with this? I just want to make clear that I am not judging you, to each its own but if you have a problem with him watching porn the bigger problem at hand is clearly being ignored. Him "taking care of it" is not the answer, the girls phone number should not have been there in the first place.
It's ok to watch porn and masturbate, but when things he does begin to affect your lives together then there is more help needed.