Can username be found with iPhone IP address?

Can I find out AOL screen names with iPhone IP?
I need to figure what my husband is doing on his private AOL acct but I can't figure out his username or screen name. Is there any way if finding out maybe with IP address of his iPhone? I don't mean to be stalkerish but I'm 5 months preg & we have a 2 year son whom I need to look out for & if he's cheating I need to take care of things now instead of later. Any help appreciated.

No, an IP address only identifies the device and from that the phone carrier. Some ip program tracers can also find out the phone owner name and address.

You should not be checking up on your husband, if you think he is cheating find evidence another way. If he has not done anything and he finds out you don't trust him you will drive him away.

Without trust no relationship can last.

If you want to see what sites someone has been on on a computer check the history and cookies. If they haven't cleared them it will show every site they have been on but most people that use a computer Lot clear it to save memory and keep speed.