Authorities say they have charged four women with running a prostitution network in California, Nevada and Utah that netted tens of thousands of dollars a month, according to KTLA.

The four women are charged with pimping and pandering and the two alleged ringleaders, Jodi Leigh Hoskins, 43, and Torri Ti Wilkinson, 37, are also charged with conspiracy. The other two women charged, Aisha Kaluhiokalani, 39, and Andrea Smith Tizzano, 30, allegedly ran the call centers, according to the Washington Post.

Investigators said Hoskins is the president of a company called “Companions.” Customers would make contact with girls using their website or by phone at call centers in Santa Ana and Palm Springs, according to KESQ.

The suspects were operating a website that appeared to be a legitimate service but was not, according to the OCDA, Todd Spitzer.

The Companions Escort scheme was discovered a year ago by an undercover police agent who was investigating human trafficking in Southern California.

The suspects were renting office space in two California cities, that they were using as call centers. Their website featured photos of scantily dressed women and promised to meet “ALL your adult entertainment needs.”

Three of the suspects were arrested on Tuesday, in California, and one was arrested in Nevada.