Here they are :
*www.ndncregistry.com/indian-consumers-telecom-online.htm
*www.ndncregistry.com/indian-consumers.htm
credit to Mrintech
but i dont why the F$$$ tata`s DND page is not available . I went thru thier site and found that we have to register in thier site, which needs a tata number.
when we register to DND of our network , the spam from our network stops , but not from other networks..
is there any workaround ?