Well under 19k rank you are eligible to grab a decent seat at decen at NIT.

Congratulations for getting a decent rank firstly.

Now considerng colleges, if I even assume you from the Northern side

The best college at this rank is

1. MNNIT Allahabad

2. NIT Jaipur

3. IIIT Allahabad (though chances are very poor)

4. NIT Bhopal

Thank You