Hello teja,

Congratulations on getting 6023 crl rank. However the your chances of getting into NIT are quite less. Do wait for the official cut off but do search for alternative options. You can also use the college predictor to know that whether you will get a seat or not. The link to college predictor is provided below: 

ttps://engineering.careers360.com/jee-main-architecture-college-predictor 

Hope this will help you.

All the best!