GSTIN → Verified Contact

Turn any GST number into a reachable business contact

Give us a GSTIN or a whole spreadsheet of them. We return the registered business name, address, status and a working phone number – checked against current records, not a scraped dump from three years ago.

GSTIN Lookup

GST Identification Number

27ABCDE1234F1Z0

Illustrative result. Get sample format for live records.

36

States & UTs with GST codes

15

Characters in every GSTIN

10

PAN characters inside it

2

Digit state code prefix

How It Works

From a GST number to a conversation in four steps

No portal to learn and no integration work. Send a file, get a file.

1

Send your GSTINs

Paste a single number or upload a CSV with thousands. We accept whatever column order your sheet already uses.

2

We match the records

Each GSTIN is checked against current registration records for name, address, status and contact fields.

3

Verification pass

Numbers are screened for format, reachability and obvious staleness before anything is handed over.

4

You get a clean file

A CSV or Excel file with the contact fields appended to your original rows, plus a match-rate summary.

What You Receive

Every field we return against a GSTIN

One row per GST number. Phone and email depend on what is actually on record – we mark blanks rather than inventing a number to pad the file.

FieldDescriptionAvailability
GSTIN15-character registration numberAlways
Legal / trade nameName as filed with the GST authorityAlways
Registration statusActive, cancelled or suspendedAlways
State & state codeDerived from the first two digitsAlways
Principal place of businessRegistered address with PIN codeAlways
Phone numberPrimary reachable business numberWhere available
Email addressBusiness email on recordWhere available
Constitution of businessPvt Ltd, LLP, proprietorship and so onAlways
Registration dateDate GST registration took effectAlways
Taxpayer typeRegular, composition or casualAlways
Data Quality

Three checks before a row reaches your file

1

Structure

The GSTIN is checked for correct 15-character format and a valid check digit. A number that fails its own checksum cannot be a real registration, so it never reaches the billable stage.

2

Status

The registration is resolved to active, cancelled or suspended, with the effective date. A cancelled counterparty is often the single most valuable row in the file.

3

Contact

Phone numbers are screened for valid format, correct series and obvious staleness. Anything that fails is returned blank rather than shipped to pad the count.

What every delivery summary reports

You are billed on matched rows only – invalid and unmatched rows never appear on the invoice.

GSTIN Basics

What a GST number tells you, and how to verify one

Before you look for a contact behind a GSTIN, it helps to know what the number itself means, why it should be checked, and where the public record stops.

What is a GSTIN?

A GSTIN, or Goods and Services Tax Identification Number, is the 15-character registration number given to every business registered under GST. It appears on every tax invoice, e-way bill and return, and it ties each transaction to one taxpayer in one state.

GSTN is the network that runs the GST system; GSTIN is the number it issues. When people search for a “GSTN number”, they mean the GSTIN. Because it is built on the PAN, one business can hold a separate GSTIN in every state it operates from, all sharing the same PAN in characters 3 to 12.

GSTN number search: GSTIN format with 15 characters - state code, PAN, entity number, letter Z and check character

Why every GST number should be verified

Protect input tax credit

Credit on a purchase holds only when the supplier’s registration is genuine and active on the invoice date.

Keep invoices accurate

A wrong buyer GSTIN breaks e-invoices and returns on both sides and forces corrections later.

Block fake suppliers

Borrowed, cancelled or invented numbers are caught in seconds, before any payment goes out.

How to verify a GSTIN in four steps

1

Check the format

15 characters, a valid state code, the PAN in the middle and Z in position 14.

2

Search the registry

Use the taxpayer search on the official GST portal and enter the GSTIN with the captcha.

3

Match the record

Compare legal name, trade name, address and taxpayer type with the invoice.

4

Confirm the status

Proceed only on an active registration; pause on suspended, stop on cancelled.

Red flags of a fake GSTIN

Where the public record stops

A GSTIN search confirms the registration: names, address, constitution, taxpayer type and status. It does not show the owner’s phone number or email. That is the gap we fill – a reachable business contact matched back to the same GSTIN and legal name.

Compare

Why a GST-sourced record beats a scraped list

Row count is the easiest number to inflate and the least useful one to buy on. Here is what actually differs.

GST-sourced dataScraped listPaid directory
Where the record comes fromA live GST registration filingPages scraped off directoriesA directory listing someone paid for
Tells you if the business still tradesYes – registration status and dateNoNo
Legal name matches the invoiceYes, as filedOften a trading name onlyUsually a brand name
Address is the registered premisesYes, with PINWhatever the page showedMarketing address
Blank fields left blankYesPadded to inflate row countPadded
You can check it before buyingYes – sample format on your own GSTINsRarelyRarely
Why Us

Why teams choose us over a scraped list

01

Verified, not scraped

Anyone can dump a list off a public page. We check each record against current registration data and screen the numbers before delivery.

02

Blanks stay blank

If a registration has no usable phone number we leave the field empty. Padding a file with invented numbers wastes your callers’ time and your money.

03

You see it before you buy

Send a handful of GSTINs and we return the real output for those rows. Judge the data, then decide.

04

Priced per file

Pay for the records you need. No seat licences, no annual lock-in and no minimum commitment to get started.

05

Sliced how you sell

Filter by state code, city, industry, taxpayer type or registration date so your team works one clean territory at a time.

06

Compliance built in

Every delivery carries usage terms, and we will not supply data for spam, impersonation or any use that breaches telecom rules.

Who Uses This

Six teams that live on GST-linked contact data

Sales

Outbound prospecting

Build a call list of GST-registered businesses in the exact state, city or sector you sell into.

Procurement

Supplier verification

Confirm a vendor is genuinely registered and reachable before you release a purchase order.

Finance

Counterparty checks

Match invoices to an active registration and flag counterparties whose GSTIN has been cancelled.

Recovery

Tracing a business

Reach a business that has moved or stopped answering the number on its last invoice.

Marketing

Territory planning

Size a market by state code before you commit budget or hire a field team for the region.

Compliance

KYC and onboarding

Pull registered name, address and status as part of a vendor onboarding file.

Coverage

All 36 states and union territories, by GSTIN code

The first two digits of any GSTIN are its state code. That makes state the cleanest way to cut a contact file into territories your team can actually work.

Need a single state, a cluster of districts or a national file? Tell us the territory and we will scope it.

Sectors

Filter the file down to the businesses you actually sell to

A broad GST pull is mostly noise for a specialist seller. Narrow it by sector and every call lands with somebody who buys what you make.

Sector not listed? Describe the business type and we will tell you what coverage looks like.

Pricing

Pay for matched records, not for seats

Unit cost falls as volume rises, and rows that come back empty are never billed. Tell us the shape of the job and you get a written quote.

Starter

One-off file

A single list or a first test, delivered as CSV or Excel.

Business

Volume pricing

Regular campaigns at scale, with state, city or industry filters and priority turnaround.

Enterprise

Custom

Continuous or integrated use, API access and scheduled refreshes of your existing database.

Resources

Explore GST contact guides by topic

Choose a topic to open its dedicated page and browse the related guides, tools, and lookup articles.

Practical guides for finding and reviewing business phone details from a GSTIN.

Mobile-focused lookup guidance for GST-registered business contacts.

Broader contact-search workflows for GSTIN-based business research.

Guides to lookup tools, APIs, enrichment, and repeatable GSTIN workflows.

Planning, processing, and reviewing larger GST contact datasets.

Open the complete resource library and choose the best starting point.

See the real data before you spend anything

Send us five GST numbers from your own list. We will return the exact output you would get in a paid file, so you can judge the match rate yourself.

FAQ

Frequently Asked Questions

The questions we get asked before almost every first order.

Yes, in most cases. A GST registration is filed with contact details attached to it, and a large share of active registrations carry a working business phone number. We match your GSTIN against current registration records and return the number on file. Where a registration genuinely has no usable number, we mark the row blank rather than guessing.

GST registration details are business records, not personal ones, and using them to contact a company about a business matter is normal commercial practice. What matters is how you use them: honour do-not-call registrations, follow TRAI and DLT rules for calls and SMS, identify yourself properly and stop contacting anyone who asks you to. We supply data for legitimate business use only.

Registration status, name and address come from current records. Phone numbers are the ones attached to the registration, and businesses do change numbers without updating their filing, so no provider can honestly claim 100%. We re-check records before delivery and tell you the match rate for your specific file before you pay.

That is the normal way our customers work. Send a CSV or Excel file with a GSTIN column and we return the same file with the contact fields appended, so nothing in your existing sheet gets rearranged. We confirm the delivery window with you before the job starts.

You still get the row, flagged as cancelled or suspended along with the date. That is often the most useful part of the result – it tells your finance team to stop claiming input credit against that counterparty and tells your sales team to stop chasing a dead account.

No. You can buy a one-off file sized to what you actually need. Subscriptions exist for teams that pull data continuously, but nothing about the service requires one.

Yes, and most customers should. A national file is rarely the right first purchase – a single state or a single sector is cheaper, lands faster and tells you whether the data converts before you scale the spend.

For one number, it is not – the official portal costs nothing and you should use it. The difference is scale. Checking fifty thousand numbers by hand is weeks of work, and the portal will not hand you a filtered territory list you never had the GSTINs for in the first place.

Where an email is on the registration record, yes, and it is returned in the same row. Email coverage is lower than phone coverage, so treat it as a bonus field rather than the reason to buy.

It is processed for your order and nothing else. We do not merge your list into a product we sell to somebody else, and uploaded files are deleted once the job is delivered unless you ask us to keep them for a recurring run.

Yes. A registered business must print its GSTIN on every tax invoice and bill of supply, and quote the buyer’s GSTIN on business-to-business invoices. The registration certificate also has to be displayed at each place of business.

Yes. A business needs a separate GSTIN in each state or union territory it supplies from, and can hold more than one in the same state for separate business verticals. All of them carry the same PAN in characters 3 to 12.

Search the GSTIN on the official GST portal and read the status line. Active means the registration is valid; suspended or cancelled means you should not rely on new invoices from that number. Our files report the same status, with the effective date, for every row.

Yes. A GSTIN search shows the principal place of business and any additional places registered under that number. It does not show the owner’s phone number or email – that is what our matched contact file adds.

GST To Phone Number logoGST To Phone Number

We help sales, procurement and compliance teams turn a GST registration number into a verified, reachable business contact.

Get Sample Format

Send us a few GSTINs and we will return the matching contact fields so you can judge the data before you buy.

© 2026 GST To Phone Number. All rights reserved.

Disclaimer: GST To Phone Number is an independent data service. We are not affiliated with, endorsed by or connected to the Goods and Services Tax Network, the Central Board of Indirect Taxes and Customs, or any government department. GSTIN verification should always be confirmed against the official GST portal. Contact data is provided for legitimate business use and must be used in line with applicable telecom, privacy and data-protection rules.