Congratulations on getting this much rank in jee main 2018.

http://tools.collegepravesh.com/college-predictor/jee-main/

Visit this link and enter all your credentials to have an idea regarding which colleges you will be getting on the basis of your rank.

I am listing here a few colleges which you can get on the basis of this rank

• Indian Institute of Information Technology, Design & Manufacturing, Kancheepuram
• National Institute of Technology Sikkim
• National Institute of Technology, Rourkela
• National Institute of Technology Durgapur
• National Institute of Technology Agartala
• National Institute of Technology Hamirpur
• Indian Institute of Information Technology Surat
• National Institute of Technology Nagaland
• National Institute of Technology Arunachal Pradesh 
• Indian Institute of Information Technology(IIIT) Una, Himachal Pradesh
• Indian Institute of Information Technology Guwahati
• Dr. B R Ambedkar National Institute of Technology, Jalandhar
• National Institute of Technology Meghalaya
• National Institute of Technology, Jamshedpur
• Indian Institute of Information Technology (IIIT) Nagpur
• Indian Institute of Information Technology (IIIT) Pune