Check whether a PAN (Permanent Account Number) matches the standard structure, and see the holder type it indicates.
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Check whether a GSTIN matches the standard 15-character format and extract its PAN and state code.
Check whether a bank account number has a plausible format.
Mask an Aadhaar number to show only the last 4 digits.
Check whether an IFSC code matches the correct format.
Validate and format an Indian mobile number with country code.