Check the SIM registration details on the original SIM purchase documents
Visit a BSNL Customer Service Center with valid ID proof to request verification
Call BSNL customer care from your BSNL number and ask for account holder details verification
Use the BSNL Self Care portal or BSNL mobile app if the number is linked to your account
Check the name registered with the number through any official KYC or telecom records you have access to
If the number is in your name, review the SIM activation form or eKYC confirmation
If needed, submit a written request at a BSNL office with identity proof and proof of ownership
For legal or safety-related cases, request owner details through police or authorized legal channels