GST Utility by CA Gyaan Sadhna
GSTIN Predictor
Constructs the expected 15-character GST Identification Number from PAN, registration sequence and state jurisdiction, with the checksum digit derived via the official mod-36 check-digit scheme.
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Predicted GSTIN
Fill in the details and select “Unlock GSTIN”
14th character is fixed as “Z” per GSTIN convention. Checksum (15th digit) is calculated per the CBIC mod-36 check-digit scheme.
This is a structural preview, not an official lookup — verify any real registration on the GST portal.
Disclaimer: This tool is provided for educational and illustrative purposes only. It does not verify, register, or validate any GSTIN with GSTN/CBIC. Results may not reflect an entity’s actual GSTIN. Name, email and mobile number submitted to unlock a result are used only to contact you regarding this service and are not shared with third parties. Always confirm details on the official GST portal (www.gst.gov.in) before relying on them for any legal, tax, or business purpose. CA Gyaan Sadhna Team accepts no liability for decisions made based on this tool.