Greetings! Here's a detailed response to your query

For National-Level Colleges:

• IIT Madras (Indian Institute of Technology, Madras):
  • Think of this as one of the best engineering schools in India.
  • To get in, you need to do really well on the JEE Advanced exam.
• NIT Trichy (National Institute of Technology, Tiruchirappalli):
  • Also a super good engineering college.
  • They use your scores from the JEE Main exam to decide who gets in.

THESE COLLEGES DON'T HAVE ANY TNEA CODE.

For Colleges in Tamil Nadu (using TNEA):

• College of Engineering, Anna University (CEG) & Madras Institute of Technology (MIT):
  • These are part of Anna University, which is a big deal in Tamil Nadu.
  • To get in, you go through the TNEA process (Tamil Nadu Engineering Admissions).
  • The TNEA website has the codes you need during the application process.
  • CEG TNEA code -0001
  • MIT TNEA code-0004
• PSG College of Technology & SSN College of Engineering:
  • These are really good private colleges in Tamil Nadu.
  • They also use the TNEA process for admissions.
  • Again, use the official TNEA website for the correct college codes.
  • PSG TNEA code- 2006
  • SSN   college of Engineering - 1315

I hope this helps.