How do i check if an esn is clear by using the MEID? is there a website that tells how if a phone is clear?

i have the meid and the s/n now how do i check is the phone is clear and able to be activated?How do i check if an esn is clear by using the MEID? is there a website that tells how if a phone is clear?
Call the service provider and ask If you are worried that they might think you stole it dont worry. All you say is you bought it used and want to check if it is stolen or not.