How do I verify a GSTIN?

Use the government GST portal search or Invoism’s GSTIN validator tool to check format and registration status.

Can one PAN have multiple GSTINs?

Yes — separate registrations per state or business vertical as applicable.

Letter G

15-digit unique identification number assigned to GST taxpayers.

Calculation / formula

Format: 2 digits (state) + 10 (PAN) + 1 (entity) + Z + 1 (checksum).

How do I verify a GSTIN?: Use the government GST portal search or Invoism’s GSTIN validator tool to check format and registration status.
Can one PAN have multiple GSTINs?: Yes — separate registrations per state or business vertical as applicable.