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Network of MLS sites represents 600,000-plus Realtors

An online network of public-facing multiple listing Web sites, launched six months ago, now features dozens of participating associations and MLSs that together represent about 612,000 Realtors, according to an announcement Thursday, which is more than half of the U.S. Realtor population. serves as a consumer portal to its participants’ individual public-facing property-search Web sites, and features a clickable U.S. map to bring consumers to the most relevant sites.