question How to locate this owner?

[NameAgency]

I want to buy a .in domain and cannot locate the owner.
The whois data is:

Registrant Name: Domain Manager
Registrant Organization:Online Directory Services
Registrant Street1:Office C-119, Grace Plaza,
Registrant Street2:S. V. Road,
Registrant Street3:Jogeshwari
Registrant City:Mumbai
Registrant State/Province:Maharashtra
Registrant Postal Code:400102
Registrant Country:IN
Registrant Phone:+91.9167338231
Registrant Phone Ext.:
Registrant FAX:
Registrant FAX Ext.:
Registrant Email:[email protected]

As I've checked, there are lots of domains with the same whois data (ex: book.in, Test.in, Act.in, school.in, channel.in, pool.in, blog.in, Design.in).
Anyone can help?

Thanks

 

[Kate]

What's the problem ? You can't send an E-mail or pick up the phone ?

 

[NameAgency]

Sorry, I did not specified this. Yes, of course I've sent an email and called to the phone number, many times, with no luck.
Since it seems to be a big domain owner, just wanted to know if someone has any clue.