For Posts between 1-500

http://www.bing.com/webmaster/ping.aspx?siteMap=http%3A%2F%2Fwww.latesthacksandtricks.com%2Fatom.xml%3Fredirect%3Dfalse%26start-index%3D1%26max-results%3D500

For Posts between 501-1000

http://www.bing.com/webmaster/ping.aspx?siteMap=http%3A%2F%2Fwww.latesthacksandtricks.com%2Fatom.xml%3Fredirect%3Dfalse%26start-index%3D501%26max-results%3D500

For Posts between 1001-1500

http://www.bing.com/webmaster/ping.aspx?siteMap=http%3A%2F%2Fwww.latesthacksandtricks.com%2Fatom.xml%3Fredirect%3Dfalse%26start-index%3D1001%26max-results%3D500

replace the url by the url of your blog

for more info follow my blog or post ur queries here .