CHARLOTTE, N.C. -- As details continue to emerge about the multimillion-dollar "Hush-Hush" call-girl ring that operated in Charlotte, many other escort services continue operating too.

Police said the Internet has made prostitution easier to offer, but Eyewitness News found that some sites are also requiring customers to provide personal information that could come back to haunt them.

While the "Hush-Hush" call-girl case plays out in federal court and customers sweat over the potential release of a client list, police in Charlotte said they are continuing to fight an intimidating number of similar services.

All it takes is a few keystrokes on a computer to find other escort services operating in Charlotte.

Charlotte-Mecklenburg police showed Eyewitness News Web sites that operate almost like retail stores, allowing customers to select who they want, where they want and when they want.

Capt. Mike Adams heads the police department's vice unit.

"I think the Internet and technology has allowed people to go about doing their business in those type of ways. It is something that we monitor and keep an eye on," Adams explained.

The level of explicit detail on this site, and others, is staggering. Click on a woman's picture and there are nude photos, a listing of "services" offered and even rates at hundreds of dollars per hour. This site calls for "donations" -- others say "honorariums" are for "companionship only - that any sex is between two consenting adults."

"Detectives who actively track and arrest escort service call-girls say whatever code words they use, they're still talking about sex for money -- which is prostitution, which is illegal. But there's something else involved in the transaction that's not talked about very often. It's personal information from customers that online escorts often require just to make a date.

In an ad on escorts.com, a woman tells potential customers "be prepared for an identity screening before we meet." In another page: "All gentlemen will be required to show ID."

All undercover detectives who've arrested more than 100 escorts on prostitution charges this year say most call girls compile and keep client lists.

"Every girl that I've run into, as soon as I arrest her I get a notebook or a computer that has a list of clients that they've seen all over the United States," an undercover detective explained.

Federal agents said those very kinds of details were collected by Donald and Sallie Saxon in the "Hush-Hush" case, and court documents have included partial names like "Skipper" and "Britt." If the case goes to trial, the entire list could be made public.

Undercover detectives who work in the vice unit in Charlotte say no client name is safe.

"Is there reason for the clients to be concerned? Sure there is. A lot of times after I arrest them they'll say 'Hey, I know such-and-such -- he's one of my clients. Is that gonna help me out?' So they're real quick to give up their Johns," the undercover detective told Eyewitness News.

Police said any customers who think Internet prostitution transactions offer anonymity are wrong and taking a risk that could backfire very publicly.