With your CRL rank of 177043 and OBC-NCL rank of 59912, your chances of getting into a top-tier NIT for B.Tech in CSE are limited, but not impossible. You can explore a few options, including NITs with lower closing ranks and private engineering colleges.

Possible Options:

Mid-Tier and Lower-Tier NITs:

Some NITs, especially those in the mid-tier and lower-tier categories, might accept your rank for B.Tech in CSE with OBC-NCL reservation.

NITs with CSE programs at higher ranks:

NITs like NIT Meghalaya, NIT Puducherry, and NIT Hamirpur may have CSE openings with closing ranks in the range of your OBC-NCL rank.

State-Level Engineering Colleges in Uttar Pradesh:

Uttar Pradesh has several government engineering colleges that might be accessible with your rank. Consider MNNIT Allahabad and MMMUT Gorakhpur.

Private Engineering Colleges:

Many private engineering colleges accept JEE Main scores for admissions. Amity University, Galgotia University, and SRM Institute of Science and Technology (SRMIST) are a few examples.

State Engineering Colleges:

Uttar Pradesh has several state-level engineering colleges that offer B.Tech in CSE. Explore options like IIIT Allahabad and DEI Agra.

IIITs:

IIITs, such as IIIT Allahabad, IIIT Bhopal, and IIIT Nagpur, might be accessible with your rank, especially for OBC-NCL candidates.

Recommendations:

Check Cutoff Trends:

Analyze past JEE Main cutoff trends for NITs, IIITs, and state-level colleges to get a better understanding of your potential for admission.

Consider Lower-Tier NITs:

Don't hesitate to explore lower-tier NITs, as they can still provide a quality engineering education.

Explore Private Colleges:

Private engineering colleges can offer a good alternative if you're unable to secure a seat in a government institution.

Participate in State Counseling:

Participate in state-level engineering counseling conducted by Uttar Pradesh, as this can increase your chances of getting into a local college.

Important Note: Admission to engineering colleges is highly competitive, and the chances of getting into a specific college depend on factors like your rank, category, seat availability, and the college's cutoff trends.