South Korea Business Registry (IRO & data.go.kr Korea) & Open Business Companies Data: 13-digit Corporate Registration Number (CRN) & 10-digit BRN, Official Portals & Master Data

What You Need to Know at a Glance: South Korea Business Registry & Company Master Data (IRO & data.go.kr Korea)

Corporate verification and company master data research in South Korea are anchored by Supreme Court Internet Registry Office (IRO), FTC & Open Government Data Portal (data.go.kr), where registered legal entities are tracked under their statutory 13-digit Corporate Registration Number (CRN) & 10-digit BRN. Across South Korea’s public sector, official corporate records are distributed across 12 verified institutional portals operated by Ministry of the Interior and Safety / NIA open-data platform, National Tax Service through data.go.kr, Financial Supervisory Service, Supreme Court of Korea. Primary legal-entity lookup routes include DART disclosure system (Financial Supervisory Service) and Supreme Court Internet Registry Office (Supreme Court of Korea).

To supplement statutory registration records from IRO & data.go.kr Korea, official verification workflows in South Korea draw upon fiscal and taxpayer registration via NTS business registration verification and status API (National Tax Service through data.go.kr); open data catalogues and statistical business frames through Open Government Data Portal (Ministry of the Interior and Safety / NIA open-data platform) and Open DART API (Financial Supervisory Service); financial supervision, capital-market disclosures, and LEI records from GLEIF LEI API for South Korea (Global Legal Entity Identifier Foundation); public procurement notices, official gazettes, and intellectual-property registers such as KONEPS procurement introduction (Korea ON-line E-Procurement System / Public Procurement Service) and KONEPS / G2B portal (Public Procurement Service).

How the Official South Korea Business Registry (IRO & data.go.kr Korea) & Public Data Ecosystem Work

South Korea is one of the stronger Asian jurisdictions for official company-data engineering, but the strength comes from multiple official systems rather than one simple public register download. The useful stack combines data.go.kr public-data APIs, National Tax Service business-registration status checks, Open DART disclosures, Supreme Court registry extracts, KIPRIS intellectual-property data, KOSIS statistics, KONEPS procurement and GLEIF LEI records.

Registry coverage: South Korea source work should not start by assuming a single bulk register. The Supreme Court registry route is the legal-register evidence path, while public-data and tax APIs solve narrower validation and status questions. That matters for KYB, deduplication and audit trails because a business-registration status response is not the same as a court-issued corporate extract.

API and bulk confidence: API confidence is high for specific official layers: data.go.kr datasets, the NTS business-registration status API, Open DART, KIPRISPlus, KOSIS, procurement APIs and GLEIF. It is medium for complete private-company register coverage because formal registry documents and certificates sit behind controlled workflows.

Update risk: NTS status data, DART disclosures, registry extracts, IP records, procurement notices, KOSIS statistics and LEI records update on different schedules. A normalized dataset should store source dates at field level, not one generic South Korea timestamp.

Business-registration status boundary: an NTS API response is useful for validation, but it should not be inflated into legal profile completeness, owner disclosure or marketing permission.

Official South Korea Business Registry, Company Data API & Master Data Portals (12 Verified Sources)

Core Corporate Registry, Entity Lookup & Statutory Filings

DART disclosure system — Financial Supervisory Service

Data & Access: search / filing documents / disclosure portal

Terms & Operational Scope: DART portal terms and filing-specific limitations. Coverage follows securities-disclosure obligations and does not replace tax or court registry data.

Supreme Court Internet Registry Office — Supreme Court of Korea

Data & Access: search / certificates / controlled or paid extracts

Terms & Operational Scope: controlled registry terms, certificate rules and privacy cautions. Not a free open bulk register; access, language, identity/payment and document-use controls may apply.

Tax Authority, Fiscal Registration & Customs Identifiers

NTS business registration verification and status API — National Tax Service through data.go.kr

Data & Access: OpenAPI / JSON / XML / service key

Terms & Operational Scope: public-data portal terms, API service conditions and personal-data caution. It verifies status; it is not a full legal-company profile, court-register extract or marketing list.

National Open Data Portals, Bulk Feeds & Statistical Agencies

Open Government Data Portal — Ministry of the Interior and Safety / NIA open-data platform

Data & Access: catalogue / APIs / downloads / dataset pages

Terms & Operational Scope: dataset-specific public-data licence and portal terms. The portal is a catalogue; each dataset has separate approval, fields, licence and service limits.

Open DART API — Financial Supervisory Service

Data & Access: API / key registration / disclosures and financial data

Terms & Operational Scope: Open DART terms and API conditions. DART is disclosure-scope data, not a universe of every registered Korean business.

KOSIS Open API — Statistics Korea

Data & Access: Open API / aggregate statistics

Terms & Operational Scope: statistics/public-data terms and attribution requirements. Aggregate statistics are not record-level company profiles and cannot validate individual entities.

Central Bank, Financial Supervision, Capital Markets & LEI

GLEIF LEI API for South Korea — Global Legal Entity Identifier Foundation

Data & Access: API / open LEI data

Terms & Operational Scope: GLEIF API and open-data terms. LEI coverage is a regulated subset and is not comprehensive South Korean company coverage.

Public Procurement & Intellectual Property Registers

KONEPS procurement introduction — Korea ON-line E-Procurement System / Public Procurement Service

Data & Access: portal documentation / procurement workflow

Terms & Operational Scope: procurement portal terms and notice-level conditions. Procurement participation is a subset of companies and can be behind login or workflow controls.

KONEPS / G2B portal — Public Procurement Service

Data & Access: portal / search / SSO workflows

Terms & Operational Scope: procurement portal terms and tender-level terms. The portal is not a complete business register and some workflows route through SSO.

Public Procurement Service statistics API — Public Procurement Service through data.go.kr

Data & Access: OpenAPI / public-data portal service

Terms & Operational Scope: public-data portal terms and API service conditions. Statistics-level or API-specific coverage; not a full supplier master file for all companies.

KIPRISPlus — Korean Intellectual Property Office / KIPRISPlus

Data & Access: bulk data / OpenAPI / productized IP services

Terms & Operational Scope: KIPRISPlus product terms and service-specific conditions. IP ownership is an enrichment signal, not proof of current company status or full legal identity.

KIPRIS search — Korean Intellectual Property Office / KIPRIS

Data & Access: search portal / public IP records

Terms & Operational Scope: KIPRIS terms and IP record-specific limits. Search results need owner-name matching and should not be treated as bulk company-register data.

Complete Comparison Matrix: South Korea Business Registry (IRO & data.go.kr Korea), Company Master Data & Open Data APIs

Official Source	Issuing Authority	Access & Data Provided	Reuse & Licensing	Operational Scope & Boundaries
Open Government Data Portal	Ministry of the Interior and Safety / NIA open-data platform	catalogue / APIs / downloads / dataset pages	dataset-specific public-data licence and portal terms	The portal is a catalogue; each dataset has separate approval, fields, licence and service limits.
NTS business registration verification and status API	National Tax Service through data.go.kr	OpenAPI / JSON / XML / service key	public-data portal terms, API service conditions and personal-data caution	It verifies status; it is not a full legal-company profile, court-register extract or marketing list.
Open DART API	Financial Supervisory Service	API / key registration / disclosures and financial data	Open DART terms and API conditions	DART is disclosure-scope data, not a universe of every registered Korean business.
DART disclosure system	Financial Supervisory Service	search / filing documents / disclosure portal	DART portal terms and filing-specific limitations	Coverage follows securities-disclosure obligations and does not replace tax or court registry data.
Supreme Court Internet Registry Office	Supreme Court of Korea	search / certificates / controlled or paid extracts	controlled registry terms, certificate rules and privacy cautions	Not a free open bulk register; access, language, identity/payment and document-use controls may apply.
KIPRISPlus	Korean Intellectual Property Office / KIPRISPlus	bulk data / OpenAPI / productized IP services	KIPRISPlus product terms and service-specific conditions	IP ownership is an enrichment signal, not proof of current company status or full legal identity.
KIPRIS search	Korean Intellectual Property Office / KIPRIS	search portal / public IP records	KIPRIS terms and IP record-specific limits	Search results need owner-name matching and should not be treated as bulk company-register data.
KOSIS Open API	Statistics Korea	Open API / aggregate statistics	statistics/public-data terms and attribution requirements	Aggregate statistics are not record-level company profiles and cannot validate individual entities.
KONEPS procurement introduction	Korea ON-line E-Procurement System / Public Procurement Service	portal documentation / procurement workflow	procurement portal terms and notice-level conditions	Procurement participation is a subset of companies and can be behind login or workflow controls.
KONEPS / G2B portal	Public Procurement Service	portal / search / SSO workflows	procurement portal terms and tender-level terms	The portal is not a complete business register and some workflows route through SSO.
Public Procurement Service statistics API	Public Procurement Service through data.go.kr	OpenAPI / public-data portal service	public-data portal terms and API service conditions	Statistics-level or API-specific coverage; not a full supplier master file for all companies.
GLEIF LEI API for South Korea	Global Legal Entity Identifier Foundation	API / open LEI data	GLEIF API and open-data terms	LEI coverage is a regulated subset and is not comprehensive South Korean company coverage.

Operational Scope, Access Workflows & What Is Missing from Public South Korea Registry Records

DART boundary: DART is authoritative for filings and disclosure-scope companies, but it excludes many ordinary private companies and should be joined as an enrichment layer.

Court registry boundary: iROS can matter for formal evidence, yet controlled extracts, certificates, authentication, payment and Korean-language workflows make it different from open bulk data.

Contact-data boundary: public company data is not a contact list. Email, phone, contact roles, suppression files and sales-prospecting enrichment need a separate lawful-basis workflow.

Start with the NTS business-registration verification/status API when the use case is validating Korean business-registration numbers or status. Store the queried number, response date, returned status fields, service key environment, portal dataset URL and any error codes. Do not merge this into a legal-profile table without a source flag showing that it is tax/status evidence.

Use Open DART and DART for companies subject to disclosure obligations. This layer can add corporate reports, financial statements, disclosure dates and issuer-level events. It is strong for securities and filing workflows, but it should be joined by disclosure identifiers and company names with confidence scoring rather than assumed universal coverage.

KONEPS, KOSIS, KIPRIS/KIPRISPlus and GLEIF are high-value enrichment sources. Procurement records can signal supplier activity; KOSIS can benchmark market coverage; IP records can add patent or trademark ownership; LEIs can support financial-sector KYB. Each one needs separate provenance because none of them is the official corporate identity source for every Korean business.

• Best API entry point: data.go.kr is the main discovery and access route for official public-data APIs, including the NTS business-registration status API and procurement/statistics datasets.
• Best disclosure layer: Open DART and DART provide securities filings, reports and financial data for listed and filing-obligated companies, not the entire company universe.
• Best legal-register caveat: the Supreme Court Internet Registry Office is relevant for formal corporate-register extracts, but it is controlled-access, not free open bulk data.
• Best enrichment sources: KIPRIS/KIPRISPlus, KOSIS, KONEPS and GLEIF add IP, statistics, procurement and LEI signals when kept separate from core identity fields.
• CompaniesData value: practical use needs normalization, Korean/English name handling, identifier matching, source provenance, update tracking and contact-data governance.
• No single complete open file: South Korea should not be sold as having one complete free official bulk company-register file.
• Private-company depth: ordinary private-company legal details can require controlled registry routes rather than public API extraction.
• Beneficial ownership: do not assume public beneficial-ownership data is available or reusable without a source-specific lawful-use review.

Frequently Asked Questions: South Korea Business Registry (IRO & data.go.kr Korea) & Company Data

Is South Korea good for open company data?

Yes, for API-led official data workflows. South Korea has strong public-data, disclosure, IP, statistics, procurement and LEI layers, but the legal-register side is controlled and should not be described as a complete open bulk register.

What is the best first source?

For status validation, start with the NTS business-registration verification/status API on data.go.kr. For securities disclosures, start with Open DART and DART. For formal registry evidence, check the Supreme Court Internet Registry Office route.

Can I download every Korean company for free from one official file?

No. The safer claim is that South Korea has strong official APIs and official enrichment sources, not one single complete free open company-register bulk download.

Does the NTS API give a full company profile?

No. It is useful for business-registration number verification and status checks, but it is not a full court-register extract, disclosure database or contact-data source.

What does Open DART cover?

Open DART covers disclosures and financial-reporting data for listed and filing-obligated companies. It is very useful for enrichment, but it does not cover every business in South Korea.

Are KIPRIS and KIPRISPlus company registers?

No. They are intellectual-property sources. They can enrich company profiles with patent, trademark and design-owner signals, but IP records must be matched and should not replace legal identity evidence.

Can procurement data be used as a supplier database?

Procurement data can identify public-sector suppliers and tender activity, but it is procurement-scope evidence only. It does not cover all companies and may involve portal-specific terms or login workflows.

Can public Korean company data be used for marketing?

Not automatically. Marketing-contact use requires separate lawful basis, suppression handling, privacy review and contact-data governance. Public company evidence and lead/contact enrichment are different layers.

Why use CompaniesData instead of collecting sources manually?

Manual collection is slow because sources use different identifiers, languages, formats, update schedules and access models. CompaniesData adds normalization, matching, deduplication, provenance and delivery formats that source portals do not provide as one product.

ENTERPRISE MULTI-COUNTRY LICENSING TIERS

Multi-Country B2B Database Repositories — Save up to 81%

Immediate download access to all national Microsoft Excel (.xlsx) & CSV repositories after checkout — 100% Tax-Free (0% Added Taxes) as Registered European Intellectual Property (EU Directive 96/9/EC) distributed directly by us.

DELIVERABLE: .XLSX + .CSV // INSTANT COMMERCIAL LICENSE

REGIONAL PACK // 19 EUROPEAN JURISDICTIONS

European Companies Database Full Pack (19 Countries)

All 19 European national databases in Excel: Germany, UK, France, Spain, Italy, Netherlands, Poland, Belgium, Switzerland, Sweden, Norway, Denmark, Austria, Portugal, Ireland, Romania, Lithuania, Slovakia & North Macedonia (7.3M+ active firms & 4.6M+ verified B2B emails).

EUR 2,248.00EUR 470.00 SAVE 79%

License Europe Pack (EUR 470) →Technical Dossier (19 Countries)

ALL-ACCESS REPOSITORY // ALL 25 GLOBAL MARKETS

Global All-Access B2B Bundle (All 25 Countries)

Includes all 19 European countries PLUS United States (1.06M firms), Canada (577k emails), Brazil (621k firms), Australia (298k firms), Indonesia & Malaysia (9.8M+ active firms & 6.4M+ verified B2B emails).

EUR 3,014.00EUR 570.00 SAVE 81%

License Global Pack (EUR 570) →Technical Dossier (25 Countries)

NATIONAL REPOSITORY INDEX // 25 JURISDICTIONS

Complete Directory of All 25 Country B2B Databases in Excel (.xlsx)

↓ Request 100% Free Sample (.xlsx)

Jurisdiction / Dataset	Region	Active Companies	Verified B2B Emails	One-Time License	Access
Germany Companies Database (.xlsx)	Europe	1,060,411 firms	908,844 emails	EUR 178.00	Instant Buy →Dossier
Spain Companies Database (.xlsx)	Europe	1,200,000+ firms	480,000+ emails	EUR 127.00	Instant Buy →Dossier
United Kingdom Companies Database (.xlsx)	Europe	840,247 firms	410,312 emails	EUR 127.00	Instant Buy →Dossier
France Companies Database (.xlsx)	Europe	580,729 firms	395,884 emails	EUR 178.00	Instant Buy →Dossier
Italy Companies Database (.xlsx)	Europe	483,706 firms	352,599 emails	EUR 178.00	Instant Buy →Dossier
Netherlands Companies Database (.xlsx)	Europe	971,883 firms	485,250 emails	EUR 127.00	Instant Buy →Dossier
Poland Companies Database (.xlsx)	Europe	660,415 firms	554,398 emails	EUR 99.50	Instant Buy →Dossier
Belgium Companies Database (.xlsx)	Europe	284,694 firms	216,151 emails	EUR 127.00	Instant Buy →Dossier
Switzerland Companies Database (.xlsx)	Europe	132,022 firms	104,602 emails	EUR 127.00	Instant Buy →Dossier
Denmark Companies Database (.xlsx)	Europe	132,453 firms	73,503 emails	EUR 127.00	Instant Buy →Dossier
Sweden Companies Database (.xlsx)	Europe	210,000+ firms	115,000+ emails	EUR 127.00	Instant Buy →Dossier
Norway Companies Database (.xlsx)	Europe	145,000+ firms	85,000+ emails	EUR 127.00	Instant Buy →Dossier
Austria Companies Database (.xlsx)	Europe	160,000+ firms	95,000+ emails	EUR 127.00	Instant Buy →Dossier
Portugal Companies Database (.xlsx)	Europe	195,000+ firms	110,000+ emails	EUR 78.00	Instant Buy →Dossier
Lithuania Companies Database (.xlsx)	Europe	150,000+ firms	90,519 emails	EUR 57.00	Instant Buy →Dossier
Romania Companies Database (.xlsx)	Europe	75,838 firms	51,716 emails	EUR 99.50	Instant Buy →Dossier
Ireland Companies Database (.xlsx)	Europe	41,148 firms	31,653 emails	EUR 78.00	Instant Buy →Dossier
Slovakia Companies Database (.xlsx)	Europe	36,528 firms	23,008 emails	EUR 127.00	Instant Buy →Dossier
North Macedonia Companies Database (.xlsx)	Europe	28,000+ firms	18,500+ emails	EUR 78.00	Instant Buy →Dossier
United States Companies Database (.xlsx)	Americas	1,064,565 firms	596,248 emails	EUR 178.00	Instant Buy →Dossier
Brazil Companies Database (.xlsx)	Americas	621,395 firms	324,177 emails	EUR 178.00	Instant Buy →Dossier
Canada Companies Database (.xlsx)	Americas	271,349 firms	577,564 emails	EUR 127.00	Instant Buy →Dossier
Australia Companies Database (.xlsx)	Asia-Pacific	298,933 firms	233,204 emails	EUR 127.00	Instant Buy →Dossier
Indonesia Companies Database (.xlsx)	Asia-Pacific	110,196 firms	47,345 emails	EUR 99.50	Instant Buy →Dossier
Malaysia Companies Database (.xlsx)	Asia-Pacific	52,504 firms	31,623 emails	EUR 78.00	Instant Buy →Dossier