Back What are the valid codes for states and union territories? The GSTIN is a unique 15-digit number provided to a taxpayer registered under the GST. The first two digits of the GSTIN represents the state code . Here’s the list of the valid GST State Codes and their Tax Identification Numbers (TIN): The GST state code 29 is assigned to the Indian state of Karnataka . This code is a crucial part of the Goods and Services Tax Identification Number (GSTIN), which is a 15-digit unique number assigned to businesses registered under GST. GSTIN is a unique tax identification number assigned to every GST registered dealer. The first two digit of the GSTIN are represented by the State Code . The list of States along with the State Codes is provided below ... Find out the state code for any GST number by looking at the first two digits. Learn which states are special states under GST and have lower turnover limits for compulsory registration.