Hi Aspirant,
I understand that you have somehow misplaced your registration number for TS-EAMCET entrance examination and so to answer your question, I would advise you to first check your registered e-mail address and your registered mobile number to check for any concerned mails or messages that you should have received while applying for the same.
If you still do not find your registration number, I suggest that you refer this issue to the concerned authorities over mail along with your significant details such as Name, Guardian's name, Date of Birth, etc and request them to fetch you your registration number for operational ease at the earliest.
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