by mistake i have removed all DNS of my domain... and now the domain is not working. please, tell me how to fix it.
Well you need your DNS server names from your host firstly. Sign in to your name.com account and click the domain you want to alter. Unlock your domain by clicking on the lock. Then click "edit name servers" on your control panel on the right. Delete the existing ones and add the new ones. Then wait a day or so for them to propogate.
yes just login in name.com and then click on domain and you will get to change the Name servers in window. Thanks