My jee main rank is 16000. Which is the best college i can get in cse ?

Dear Aspirant, at this rank you might get lower ranked NITS, IIITS  and medium ranked GFTIS for CSE branch. Here is the list of colleges that you might get according to previous year's cutoffs:-

NITS:- Andhra Pradesh, Agartala, Meghalaya, Sikkim, Manipur, Nagaland, Mizoram, Hazratbal

IIITS:- Pune, Sri City, Pune, Naya Raipur, Srirangam, Kilohrad, Surat, Kanchipuram, Kota, Bhubhaneshwar, Guwahati, Kurnool, Una, Ranchi, Kalyani,Kottayam, Nagpur, Bhagalpur, Manipur,

GFTIS:-JNU University, Sant Longowal, Guru Hasidas, Soet Chauras Campus, SET, etc

Hope it helps!! Good luck!!

Hello there
If you belong to Delhi region, you can try for NSUT, DTU, JMI, IPU or IGDTUW( if you are a girl candidate ).
Though if you are a general candidate, you won't be able to get CS at NSUT or DTU, but there are good chances that you will IT in these colleges at the subsequent rounds of seat allotment.
Good luck