Ensuring Authenticity
Verify that your supplier or buyer is genuinely registered under GST before entering any business transaction.
Free Tool | GSTIN Verification
GST Number Search & GSTIN Verification
Instantly verify any GSTIN against the official GSTN database. Get taxpayer details, registration status, jurisdiction, and more — free.
Example: 27AAPFU0939F1ZV
What is GSTIN?
GSTIN stands for Goods and Services Tax Identification Number. It is a unique 15-digit alphanumeric code assigned by the Government of India to every business registered under the GST regime.
The first two digits represent the state code. The next 10 digits are the taxpayer's PAN number. The 13th digit is the entity number for the same PAN in the same state. The 14th digit is "Z" by default, and the 15th is a check digit.
Every registered taxpayer must display their GSTIN on all tax invoices, debit/credit notes, and other official documents. It is the primary identifier used for all GST compliance activities including return filing, e-Invoicing, and ITC claims.
GSTIN Format
2
2
A
A
A
A
A
1
1
1
1
A
1
Z
A
Digits 1–2
State Code — identifies the state of registration (e.g. 27 = Maharashtra, 29 = Karnataka)
Digits 3–12
PAN of the taxpayer — the core identity linked to income tax records
Digit 13
Entity number — represents the number of registrations under the same PAN in the state
Digits 14–15
"Z" by default for all, followed by an alphanumeric check digit computed by GSTN
Five reasons to verify a GST Number.
Input Tax Credit Eligibility
Only registered and active GSTINs are eligible to pass on ITC. Verify before claiming credit to avoid rejection.
Preventing Fraud
Fake or cancelled GSTINs are used in fraudulent invoices. Instant verification protects your business from such risks.
Legal Compliance
Mentioning a valid and active GSTIN on every tax invoice is mandatory under the GST Act for all registered businesses.
Avoiding Penalties
Dealing with unregistered suppliers or fake GST numbers can attract heavy penalties and ITC reversal notices.
WhiteBooks GSP
Need bulk GSTIN verification?
Verify thousands of GSTINs at once with WhiteBooks' GST API — built for developers and finance teams.
Frequently asked questions.questions.
The GSTIN Verification Tool is a free online utility that lets you instantly verify and search any GST Identification Number against the official GSTN database. Enter a valid 15-digit GSTIN to retrieve the registered taxpayer's legal name, business type, registration status, address, and more — in real time.
GSTIN (Goods and Services Tax Identification Number) is a unique 15-digit alphanumeric code assigned to every GST-registered taxpayer in India. It is crucial for filing GST returns, claiming Input Tax Credit (ITC), generating e-Invoices, and ensuring compliance with the GST Act.
Verifying a GSTIN protects your business from fraud, ensures you can legitimately claim Input Tax Credit, and keeps you legally compliant. Dealing with unregistered or cancelled GSTINs can lead to ITC rejection, penalties, and legal notices from the GST department.
Simply type the 15-digit GSTIN in the search box and click "Search". The tool instantly fetches verified data from the GSTN database — including the taxpayer's legal name, status, registration date, jurisdiction, and principal place of business.
A GSTIN is allocated when a business successfully completes its GST registration on the GSTN portal. Businesses with annual turnover exceeding ₹40 lakhs (₹20 lakhs in special category states) are mandatorily required to register and receive a GSTIN.
You can verify a GSTIN through: (1) the official GSTN portal at gst.gov.in, (2) WhiteBooks' free GSTIN verification tool on this page, (3) the GST mobile application, or (4) through a GSP-licensed compliance software like WhiteBooks.
Yes. A taxpayer operating in multiple states gets a separate GSTIN for each state. Additionally, a taxpayer can hold multiple GSTINs within the same state for different business verticals, provided each vertical is treated as a separate business.
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