Unless she wants to be seen. She could hop on with another agency or she can go indy. Or she could simply move on and leave the business behind. I've had quite a few wonderful encounters with agency girls who one day just disappeared. Only once did I ever see an ad after the fact, but I never got the chance to contact her and I never saw her ad again.

And the agency won't tell you a damn thing, whether she's still in the business or not. In fact you risk receiving a not-so-friendly response, so I wouldn't even bother making the attempt. If she is indeed still working, she will most likely change her name as well. So you're just gonna have to keep an eye out and hope that you accidentally stumble across her info at some point down the road.

Contact the agency: simply say you noticed her profile was no longer on their site, but you really liked her and hope that if she returns they could please reach out to let you know.  Be prepared to take anything they say with a grain of salt, but occasionally an agency will give you the skinny.  In other words, they may tell you that she's taking an extended leave of absence but that she plans to return eventually.  Once, a phone girl felt more loyalty to the escort than the agency and was telling people that the girl in question was "around, and easy to find" which she was, as she'd gone independent and had ads on all the same sites as the agency.  LOL.  

Check other agency websites in your area often: she may pop up on someone else's roster.

Keep your eyes open, looking for new listings on the most-utilized ad sites for your area, to see if she begins advertising as an independent.  

 
xoxoxoxooxoxoxoxoxoxoxoxoxoxoxoxoxo

Hit up her reviewers by pm. Very possible one of her guys knows the dealio and can point you in the right direction.