While getting cash from a clinent one of the other girls can pick up it a 24 hour routine.

We get a party line discount. LOL.

Just kidding!  
If you see multiple ladies who have the same phone number, they are either with an agency, share an assistant, or some type of...... um....... manager person.  

Sharing incall.

More than likely sharing incall location.  Don't be surprised if you can't use the bathroom to clean up. With bp providers you never know. As they say in boy scouts be prepared.  If you are seeing bp providers always have a few empty water bottles. They come in handy to urinate in lol. Also have access to a 24 hour gym to you can swim a few laps and take a shower before going home to the wife.

or their own liitle co-op.

Add up all the escort phone numbers and divide by the number of escorts. That will give you the average phone number, so chances are that’s the number most of us have. (And that, ladies and gentlemen, is hooker math.)