Dear Aarthy, 

You can download neet result by this link by entering you roll number,date of birth and securiry pin.

https://ntaneet.nic.in/NTANEET/result/ResultNEET.htm

The site has blocked because lots of students are trying to open the same page.Try refreshing the page and opening into incognito tab.If both of these does not help then you would have to wait around 1 hr so that site traffic gets down and you get to open.Also ensure good speed of internet or else the server may timeout.