The more pingback addresses you have, the more chance you have of drawing traffic to your website – because more websites are being notified that you have updated your blog. So, here’s a nice big list of pingback addresses that you can add to your WordPress installation’s settings.
http://rpc.pingomatic.com/
http://api.moreover.com/RPC2
http://api.my.yahoo.co.jp/RPC2
http://api.my.yahoo.com/RPC2
http://audiorpc.weblogs.com/RPC2
http://blog.goo.ne.jp/XMLRPC
http://blogpeople.net/ping
http://blogsearch.google.ae/ping/RPC2
http://blogsearch.google.at/ping/RPC2
http://blogsearch.google.be/ping/RPC2
http://blogsearch.google.bg/ping/RPC2
http://blogsearch.google.ca/ping/RPC2
http://blogsearch.google.ch/ping/RPC2
http://blogsearch.google.cl/ping/RPC2
http://blogsearch.google.co.cr/ping/RPC2
http://blogsearch.google.co.hu/ping/RPC2
http://blogsearch.google.co.id/ping/RPC2
http://blogsearch.google.co.il/ping/RPC2
http://blogsearch.google.co.in/ping/RPC2
http://blogsearch.google.co.it/ping/RPC2
http://blogsearch.google.co.jp/ping/RPC2
http://blogsearch.google.co.ma/ping/RPC2
http://blogsearch.google.co.nz/ping/RPC2
http://blogsearch.google.co.th/ping/RPC2
http://blogsearch.google.co.uk/ping/RPC2
http://blogsearch.google.co.ve/ping/RPC2
http://blogsearch.google.co.za/ping/RPC2
http://blogsearch.google.com.ar/ping/RPC2
http://blogsearch.google.com.au/ping/RPC2
http://blogsearch.google.com.br/ping/RPC2
http://blogsearch.google.com.co/ping/RPC2
http://blogsearch.google.com.do/ping/RPC2
http://blogsearch.google.com.mx/ping/RPC2
http://blogsearch.google.com.my/ping/RPC2
http://blogsearch.google.com.pe/ping/RPC2
http://blogsearch.google.com.sa/ping/RPC2
http://blogsearch.google.com.sg/ping/RPC2
http://blogsearch.google.com.tr/ping/RPC2
http://blogsearch.google.com.tw/ping/RPC2
http://blogsearch.google.com.ua/ping/RPC2
http://blogsearch.google.com.uy/ping/RPC2
http://blogsearch.google.com.vn/ping/RPC2
http://blogsearch.google.com/ping/RPC2
http://blogsearch.google.de/ping/RPC2
http://blogsearch.google.es/ping/RPC2
http://blogsearch.google.fi/ping/RPC2
http://blogsearch.google.fr/ping/RPC2
http://blogsearch.google.gr/ping/RPC2
http://blogsearch.google.hr/ping/RPC2
http://blogsearch.google.ie/ping/RPC2
http://blogsearch.google.in/ping/RPC2
http://blogsearch.google.it/ping/RPC2
http://blogsearch.google.jp/ping/RPC2
http://blogsearch.google.lt/ping/RPC2
http://blogsearch.google.nl/ping/RPC2
http://blogsearch.google.pl/ping/RPC2
http://blogsearch.google.pt/ping/RPC2
http://blogsearch.google.ro/ping/RPC2
http://blogsearch.google.ru/ping/RPC2
http://blogsearch.google.se/ping/RPC2
http://blogsearch.google.sk/ping/RPC2
http://blogsearch.google.tw/ping/RPC2
http://blogsearch.google.us/ping/RPC2
http://feedsky.com/api/RPC2
http://hamo-search.com/ping.php
http://holycowdude.com/rpc/ping/
http://ping.blogoon.net/
http://ping.blogs.yandex.ru/RPC2
http://ping.fc2.com/
http://ping.feedburner.com/
http://ping.kutsulog.net/
http://ping.myblog.jp/
http://ping.namaan.net/rpc
http://ping.snap.com/ping/RPC2
http://ping.syndic8.com/xmlrpc.php
http://ping.weblogalot.com/rpc.php
http://ping.wordblog.de/
http://r.hatena.ne.jp/rpc
http://rpc.bloggerei.de/ping/
http://rpc.blogrolling.com/pinger/
http://rpc.icerocket.com:10080/
http://rpc.pingomatic.com
http://rpc.reader.livedoor.com/ping
http://rpc.technorati.com/rpc/ping
http://rpc.technorati.jp/rpc/ping
http://rpc.twingly.com/
http://rpc.weblogs.com/RPC2
http://wasalive.com/ping/
http://www.blogpeople.net/servlet/weblogUpdates
http://xmlrpc.blogg.de
http://xping.pubsub.com/ping/
http://zhuaxia.com/rpc/server.php
http://pingoat.com/goat/RPC2
http://api.feedster.com/ping
http://api.moreover.com/ping
http://api.my.yahoo.com/rss/ping
http://www.blogdigger.com/RPC2
http://www.blogshares.com/rpc.php
http://www.blogsnow.com/ping
http://www.blogstreet.com/xrbin/xmlrpc.cgi
http://bulkfeeds.net/rpc
http://www.newsisfree.com/xmlrpctest.php
http://ping.blo.gs/
http://www.azfeeds.com/
http://www.blogsearchengine.com/
http://www.blogtopsites.com/
http://www.feedbase.net/
http://www.feedsubmitter.com/
http://www.fybersearch.com/
http://www.plazoo.com/
http://www.readablog.com/
http://www.rssfeeds.com/
http://www.rssmad.com/
http://www.rss-spider.com/
http://blo.gs/ping.php
http://www.pingerati.net/
http://feedshark.brainbliss.com/
http://www.pingmyblog.com/
http://geourl.org/ping
http://ipings.com/
http://www.icerocket.com/
http://www.weblogalot.com/ping
http://rpc.wpkeys.com
http://rpc.britblog.com
http://cullect.com/feed/ping
http://ping.bitacoras.com
http://topicexchange.com/RPC2
http://www.blogoole.com/ping/
http://www.popdex.com/addsite.php
http://www.wasalive.com/ping/
http://www.weblogues.com/RPC/
http://blogping.unidatum.com/RPC2/