Korea Online Seller Registration Check (통신판매업 조회)

Check whether a South Korean online seller is a registered mail-order business (통신판매업 신고) and whether that registration is active, suspended, closed or revoked. Look sellers up by business registration number (사업자등록번호) or by the mail-order registration number printed in a Korean shop's footer (통신판매업 신고번호). Data comes from the Korea Fair Trade Commission's mail-order business registry (공정거래위원회 통신판매사업자 등록상세), about 2.7 million registrations, updated continuously by local governments.

No API key or Korean account needed. Paste numbers, get English JSON.

In Korea, any business selling online must register as a mail-order business with its local government and show the registration number on its site. A missing, closed or revoked registration is a red flag for a seller.

Typical uses

• Marketplaces and payment providers (PG) — verify Korean sellers at onboarding (KYB) and re-check them regularly.
• Brand protection and trust & safety teams — check whether a Korean web shop's footer number is real and still active.
• Cross-border buyers and sourcing agents — confirm a Korean supplier is a registered online seller before paying.
• AI agents — "Is the Korean online shop with business number 120-88-00767 a registered mail-order seller?"

Input

Field	Description
businessNumbers	10-digit business registration numbers, e.g. 120-88-00767 or 1208800767. Hyphens and spaces are ignored.
mailOrderNumbers	Optional. Mail-order registration numbers, e.g. 2013-서울송파-0827. Must match the registry exactly (spaces ignored).

Up to 1,000 numbers per run in total.

{ "businessNumbers": ["120-88-00767", "220-81-62517"], "mailOrderNumbers": ["2013-서울송파-0827"] }

Output

One item per input number:

{
  "input": "120-88-00767",
  "queryType": "business_number",
  "query": "120-88-00767",
  "status": "registered_active",
  "activeRegistration": true,
  "registrationCount": 1,
  "registrations": [
    {
      "mailOrderNumber": "2026-서울광진-1253",
      "status": "active",
      "statusKo": "정상영업",
      "businessName": "쿠팡주식회사",
      "entityType": "corporation",
      "businessNumber": "120-88-00767",
      "corporateNumber": "110111-5067718",
      "taxRegistrationStatus": "active",
      "taxRegistrationStatusKo": "계속사업자",
      "registeredOn": "2013-08-21",
      "lastUpdatedOn": "2026-07-24",
      "closedOn": null,
      "province": "서울특별시",
      "registrar": "서울특별시 광진구",
      "address": "서울특별시 광진구 자양동 870 번지 업무시설(A동)",
      "postalCode": "05050",
      "phone": "15777011",
      "websites": ["http:/www.coupang.com", "http://www.coupangeats.com"],
      "salesChannels": ["internet"],
      "productCategories": ["general_mall"],
      "productCategoriesKo": "종합몰"
    }
  ],
  "coverageNote": "Covers businesses registered as mail-order sellers ...",
  "source": "Korea Fair Trade Commission (공정거래위원회) mail-order business registry ...",
  "checkedAt": "2026-10-07T13:38:53+00:00"
}

status	Meaning
registered_active	At least one mail-order registration is active (정상영업).
registered_inactive	Registered before, but no registration is active now (closed, suspended, revoked or cancelled).
not_registered	No mail-order registration on file for this number.
invalid_input	Not a valid business number (check digit failed) or not a registration number — free.
lookup_failed	The official source did not answer; retry later — free.

Registration status: active (정상영업), suspended (휴업), closed (폐업), revoked (직권말소, struck off by the registrar), cancelled (직권취소), other. taxRegistrationStatus is the business's National Tax Service status as copied into the registry: active (계속사업자), suspended (휴업자), closed (폐업자), unknown. Registrations are listed active first, then newest. One business number can have several (for example after a merger or a move).

Limitations — what is not included

• Personal data is removed on purpose. Representative names, representative e-mails and the change-history text (which names past representatives) are never returned. For sole proprietors (entityType: individual) the phone number, street address and postal code are also omitted; only province and registrar remain.
• Small and foreign sellers are not covered. Very small sellers exempt from registration (for example some marketplace-only individuals) and sellers registered outside Korea are not in the registry, so not_registered is a signal to look closer, not proof of fraud.
• The two statuses can disagree. Local governments update the mail-order status on their own schedule; a seller can show active here while its tax status is closed. Read both fields.
• No search by name. The registry is searched by number only. To find a Korean company's business number from its name, use Korea Business Check.
• websites, sales channels and product categories are free text as filed by the seller (for example 오픈마켓 = "open market"), passed through unchanged.

Pricing

Pay per number checked: $0.003 per number (seller-check), whether or not a registration is found — "not registered" is also an answer. Invalid inputs and failed lookups are free.

Use as an MCP tool (Claude, Cursor, other AI agents)

Add the Apify MCP server with this Actor:

https://mcp.apify.com?tools=kr-data/korea-ecommerce-seller-registry

Source and license

공정거래위원회_통신판매사업자 등록상세 제공 서비스 (data.go.kr 15126315), 이용허락범위 제한 없음. Data is passed through unchanged except for English field names and labels and the removal of personal data described above.

More Korean data from KR Data

• Korea Business Check (KYB) — business registration status, company profile, financials
• Korean Address to English — official English address and postal code
• Korean Law in English — official English text of Korean statutes
• Korea Flood-Damaged Car Check — flood-damage insurance records by license plate