Hey Venu,for your rank through eamcet you can get the following (best) colleges:

University College of Engineering, Guntur

JNTUA College of Engineering,Kalikiri

College of Engineering, Sri Venkateswara University (SVUCE){chemical engineering}

SRKR Engineering College

Prasad V Potluri Siddhartha Institute of Technology

ANU - Acharya Nagarjuna University

Gayatri Vidya Parishad College of Engineering

for more colleges check:https://www.careers360.com/ap-eamcet-college-predictor

For jee mains getting into NIT's or GFTI's would be difficult for that rank .But you can join colleges which accept jee & 12 score.

You can know about them here: https://engineering.careers360.com/jee-main-college-predictor?icn=jeemaincollegepredictor-clgpd-trial&ici=cahometool_lp

All the best!

Hi 

With your jee rank there is no chance to get seat because your rank is too large that too in your sc category. This is soo long your ap eamcet rank also large so in nits or iiits you will not get seat.I think you have to try for ap eamcet colleges. Please apply for ap eamcet colleges you will get some good colleges in this.

Hello ,

With a rank of 21k in SC category it becomes difficult to get a nit as last year the closing ranks for all the nits in the sc category was around 6k.

You can also use the link 

https://engineering.careers360.com/jee-main-college-predictor

Best wishes