Alright, thanks for clearly sharing your details.
Let's break it down carefully:

You have:

• JEE Mains Percentile : 89.84

• CRL Rank : ~150000

• OBC-NCL Rank : ~50000

• Home State : Andhra Pradesh

• Gender : Male

• Category : OBC-NCL

Now, coming to your question:

1. Can you get IIT?

• No , not through JEE Mains alone.

• To get into IIT , you must qualify JEE Advanced (and your JEE Mains percentile should have been much higher, usually 90+ percentile only to be eligible).

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• Even if eligible, with this performance, admission into IITs won’t be possible because IITs require very high JEE Advanced ranks .

2. Can you get into NIT?

• Yes, possible , but not for top branches like CSE, ECE in top NITs.

• You have good chances in NITs for lower branches like:

  1. Mechanical

  2. Civil

  3. Metallurgy

  4. Chemical Engineering

  5. Production Engineering

• Some newer NITs or lower-ranked NITs may offer you CSE/ECE also if you are lucky with category seat and home state quota.

With Home State (AP) quota and OBC category, chances are decent in:

• NIT Andhra Pradesh (good chance for lower branches, slim chance for CSE/ECE)

• NIT Puducherry (Home state quota doesn't apply here, but seats are sometimes available for AP students)

• NIT Goa, NIT Sikkim, NIT Mizoram, NIT Nagaland — You can get good branches because these are less competitive.

3. Expected Branch Possibility

• In NIT Andhra Pradesh (your home NIT), you may get:

  1. Mechanical

  2. Electrical (possible)

  3. Civil (likely)

  4. Metallurgy / Material Science (high chance)

• CSE or ECE at NIT AP will be difficult but not 100% impossible (depends on vacancy and spot round).

4. Other Good Options

If you don’t get into NITs or want CSE branch, then:

• IIITs (newer IIITs like IIIT Kurnool, IIIT Bhagalpur) may give CSE at your rank.

• Private good colleges like SRM, VIT, Shiv Nadar, Amrita University are also open if you want CSE.

Conclusion:

• IIT admission not possible .

• NIT admission is possible , but branch may not be top ones like CSE/ECE.

• Lower branches (Mech, Civil, Chemical) at newer NITs very much possible.

• IIITs and private colleges good backup options for CSE branch.