Zillow.com reported that it had implemented a broad expansion in the number of for-sale listings on the site, bringing the total number of live listings to nearly three million today. Consumers visiting Zillow have seen a sixfold increase in the number of listings since the start of this year, due to the company's rapid growth of its Listings Feeds Program, whereby brokerages can market their listings on Zillow for free via a bulk feed.

Since the launch of this program, Zillow has sent millions of visits from interested home buyers to the Websites of partner brokerages. In addition, buyers searching homes and neighborhoods on Zillow have more options in the types of homes for sale they can find.

According to the company, buyers can now sort their searches by categories, including homes with upcoming open houses, new construction, foreclosures, homes for sale by owner and "Make Me Move homes." Buyers can also narrow their searches by type of listing, such as land for sale, single or multi-family homes, manufactured homes or condos and co-ops.

"We're incredibly pleased at the scope of new industry partners involved in our Listings Feeds program, and the resulting breadth of homes for sale and brokerages that buyers are able to find on our site today," said Jorrit Van der Meulen, the vice president of partner relations at Zillow.

Partners recently joining include major national brands such as Better Homes and Gardens Real Estate, CENTURY 21, Coldwell Banker, ERAÂ and Prudential.

Additionally, the Zillow Listings Feeds program includes independent brokerages, such as RE/MAX Indiana, First Team Real Estate, Michael Saunders, and Intero Real Estate.

"As one of the earliest adopters to the Zillow Listings Feeds program, our brands, listings and Websites have benefitted from an increase in exposure and traffic since we began syndicating to Zillow," said Craig Cuyar, the senior vice president and SVP and chief-information-officer for the Realogy Franchise Group.

Zillow has fast become among one of the most-visited online real estate sites with more than five million unique users every month, 90 percent of whom own a home and two-thirds of whom are buying or intend to sell within the next two years.