Here is my method....

If a gent leaves a message that does NOT specifically give hours that are ok to call him back or state that it is ok to call the number anytime... and it has been overnight, I will NOT call him back.

If it is during the workday, Monday thru Friday, and I missed a call or received a message... and it has been about an hour or less.. I will attempt to return the call. If it is after 5pm, I will not.

On the weekend, I use the same rules as if it has been overnight... I won't return the call unless a message gives specific times and/or permission to do so. The only exception to this would be gents that I know very well who I know are single/unattached.

When returning calls within the set amount of time...

If he answers, I simply say.. I missed a call? This gives him the prerogative to either engage in the conversation, or say I have the wrong number. If the latter, or any indication that he is in an uncomfortable position.. I will help him out by suggesting that I have dialed the wrong number!

If he does not answer, I NEVER under ANY circumstances leave a message of ANY KIND! I cannot stress this enough... NEVER LEAVE A MESSAGE... NEVER LEAVE A MESSAGE! If he notices a missed call, he will call you back if circumstances allow...

I hope this helps!

Most experienced hobbyist when leaving a message will give you the parameters of the call back.
"call me back by such and such or I'll be available for the next 2 hrs." Guys who just leave a message with no instructions about call back may just be tire kickers. My escort friends tell me that late night calls after midnight are usually from guys who want instant gratification. Many providers state in their ads the hours to call back. However, that doesn't guys will pay attention to your hours. Good luck.

Good question.

The point was already made...  NEVER, ever leave a message!
Within the hour...  ok.  If they don't pick up, fine.  If they do, just say "I had a missed call from this number".  Obiviously do not speak to a woman on a guy's phone.  "Wrong number, sorry!"  click.
Next day?  Only established clients if you know it's ok to call...  after business hours.  Late night calls from Newbies...  No call back.
Weekends:  within the hour only (or what ever your longest appointment is.)
You are right to pay attention to this.  You must be discrete at all times.
skb

Guys calling late nite don't want to go through the screening process, they are either playing games or looking for someone for right now.
If I get a message within a few minutes of them calling I will return the call, if it is more than 30 minutes, and they did not leave specific info about when to call back, then I don't return their call. I hope you guys don't think I am being rude, but I don't want to catch you at a bad time.

you a message saying it is OK to call between [insert times] or call up until [insert time].  Cold calls are frowned upon in this biz.

I'm single.
I have a hobby only phone.
I clearly state time, duration, in/out, and how long I'll be in the area in polite terms.

I also include "You can call me ANYTIME and leave ANY MESSAGE"
If they don't say that, I'd ignore a voicemail from yesterday - it is probably a waste of your time to call them back unless they indicate otherwise.