Realtor.com operator Move and REA Group — which operates listing portals in 11 countries — have launched what their parent company, News Corp., says is the “world’s largest source of global property listings.” The network, hailed by Move CEO Ryan O’Hara as an “important step forward in the evolution of real estate,” offers users of the participating property search sites access to 3 million listings in 56 countries, according to News Corp. It shows how the news giant can leverage the synergies between its many property search sites into something greater than the sum of their parts. A screencap of the new site. The network will generate 200 million visits globally every month and will later come to include content from News Corp.’s Mansion Global and India-bas…