Hi, 

Well its difficult to tell with certainity about what your rank will be since the trend depends on the highest neet marks. 

Acc to last year i.e 2018, marks between 621-630 had a rank ranging from 399-639.

In 2017 for the same mark rabge of 621-630 the ranks were between 871-1308.

So it greatly varies. 

Coming to what college you might get the there are colleges lik IMS, BHU, KGMC, lucknow, topiwala medical college etc

But these are just assumptions based on laat years trend. It varies every year. So nothing can be said with absolute guarentee as to which college u will get. 

However you might check out this link:

https://medicine.careers360.com/neet-college-predictor