GSTIN Lookup
Checks any GSTIN format instantly — decodes state, embedded PAN, entity code, and check digit with Luhn mod-36 verification. Supports bulk file decode (up to 500) with CSV export for accounts teams. Details never leave your device — validation and generation run locally in your browser.
How to Use the GSTIN Lookup
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Frequently Asked Questions
How is GSTIN structured?
15 characters: 2-digit state code + 10-char PAN + entity code + Z + checksum. The tool verifies the check digit with Luhn mod-36 over the first 14 characters (verified vector 27AAPFU0939F1ZV) across 39 state codes — legal name, address, and filing status live only on the GST portal and are never shown.
What can I verify?
Format validity instantly; active status needs the GST portal.
Why verify a supplier?
Wrong GSTINs invalidate input tax credit claims — verify before paying.
Is my GSTIN query uploaded anywhere?
No — lookup runs locally in your browser; unlimited saves on local tools.
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Last updated October 2026