21 Sites to Ping Like a King

What is Ping?
Ping means to submit your site to many search engines and directories at a time. In short ping is the shortest process to index your site for free. In another sense ping is a process to submit your updated content to major search engines and directories.
Benefits of Ping:  
* Indexing site into many search engines and directories in a short time.
* Increasing visibility in search engines.
* Submitting your updated content.
* It also helps to build backlinks.

(The number indicates Page Rank)
1. http://pingomatic.com - 6
2. http://googleping.com - 3
3. http://totalping.com - 4
4. http://pingoat.net - 3
5. http://auto-ping.com - 5
6. http://ping.in - 4
7. http://blogpingtool.com - 4
8. http://pingates.com - 2
9. https://pingler.com - 4
10. http://pingsitemap.com - 2
11. http://pingfarm.com - 3
12. http://feedshark.brainbliss.com - 5
13. http://blogbuzzer.com - 2
14. http://pingmylink.com - 3
15. http://247pinger.com - 1
16. http://twingly.com/ping - 6
17. http://www.mypagerank.net - 5
18. http://www.icerocket.com - 5
19. http://www.blo.gs - 5
20. http://www.bulkping.com - 2
21. http://bitacoras.com - 5

You Must Read:
1. List of Valid RSS Feed Submission Directory
2. Best 57 Dofollow Social Bookmarking Sites List of 2014
3. 5 Incredible Secrets to Decrease Alexa Rank Fast  

[Note: Excessive ping of a single URL within a short time can be penalized by major search engines]