In the blogging world, "ping" is an XML-RPC-based push mechanism by which a web log, or blog, notifies a server that the blog's content has been updated. An XML-RPC signal is sent to the "ping servers," which then generate a list of blogs containing new material. Many blog authoring tools automatically ping one or more servers each time the blogger creates a new post or updates an old one.

Open ping servers, like VeriSign's Weblogs.com, let other web services subscribe to a list of blogs that have recently pinged them. Blog search engines can provide fresh results very quickly by polling only the newly-updated blogs. Similarly, aggregators use results from ping servers to tell subscribers which items on their subscription lists have fresh material.

In addition to open ping servers, there are also proprietary ping servers that gather information only for their own applications. Most of the major blog search engines operate such ping servers.

Unlike open ping servers, proprietary servers with their own subscription applications have no incentive to share their received ping data directly with other servers, which may offer competing services. As these servers do not share their data, bloggers have to ping a large number of individual servers to receive the desired publicity. As a result, bloggers have turned to services such as Ping-o-matic, which pings multiple proprietary ping servers.

The following is a listing of several multiple proprietary ping servers to submit your blog to. They cover a range of several hundred ping services and blog directories, making the long pinging process without integration through blog tools a breeze:

http://pingomatic.com
http://pingoat.com
http://autopinger.com
http://pingler.com
http://pingates.com
http://pingmyblog.com
http://kping.com
http://technorati.com/ping
http://www.twingly.com/ping2
http://www.blogbuzzer.com/AutoBuzzer.aspx

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