You need an application confirmation #, thus it seems you can only check your application status if you are filing online, alone. HTH
https://secure.ssa.gov/apps6z/IAPS/applicationStatus
*Perhaps if you use an attorney or non-attorney representative, they are issued an application confirmation# when they submit your initial application. Call your rep. and get this # if they have it. You can then check your claim status online yourself, thus bypassing the middleman....your representative.