Since you didn't mentioned your category I will assume it to be General and so with your rank 1231 you have chances of getting
- MNLU Aurangabad
- NLUJAA Guwahati
- HPNLU Shimla
- DNLU Jabalpur
You may get NLUs of Aurangabad and Guwahati in 2nd round of counselling.
For more details on clat cut off for nlus use the link below