If there is any feasibility then at least creating the same username over all of them reduces the difficulty of getting confused with relevant login details. But it is very tired-some process to navigate to all such sites, clicking on create registration and then entering the username to check it availability. W

Few important Social Networking & Social Bookmarking Sites where you can check the username availability are mentioned below

Sites to check - 1) www.Namechk.com

                          2)www.usernamez.com

                          3)www.checkusernames.com

Hope u like it!

Author -  Vivek Raj