Enter the PAN of the business, to find the GSTIN or GST Number registered on that PAN. GSTIN or GST Identification Number is allotted on the basis of PAN and State of the taxpayer. The 3rd to 12th digit of a GSTIN is the PAN of the business.

Yes. PAN (Permanent Account Number) is mandatory to apply for GST Registration and get GSTIN (GST Identification Number) in India. The 3rd to 12th digit of GSTIN is the PAN of the taxpayer. However, in the case of the non-resident taxable person, PAN is not mandatory and registration can be granted on the basis of an alternate prescribed document.
Therefore, you can use the PAN of the business to search GST details like GSTIN / GST Number of a business.

Yes, there can be more than one GST Identification Number issued on a single PAN. This is usually the case when the assessee has branches in multiple states or separate business verticals within a single state.
In such a case, you will get all the GST numbers allotted on that PAN when you search the GST number by PAN.

To search GST number / GSTIN using the PAN of a business, you must have the PAN (Permanent Account Number). Usually, you can find the PAN of business on the contracts you sign with them.

Once you enter details like PAN (Permanent Account Number) in search GST number / GSTIN tool, get GST details like:
1. Get details like GST Number / GSTIN (GST Identification Number)
2. Registered state, and
3. Status of the business