> ## Documentation Index > Fetch the complete documentation index at: https://developer.kyckr.com/llms.txt > Use this file to discover all available pages before exploring further. # Search by Registration Number > Validating a company registration number in a chosen registry. You will need the company registration number and ISO country code of the registry. From this you will be able to determine if the company exist in the chosen registry and if the company number you"ve been provided is valid. ## OpenAPI ````yaml /openapi/company_v1.yaml get /core/company/number-search/{countryISO}/{companyNumber} openapi: 3.0.1 info: title: Kyckr Companies V1 API description: | Kyckr Companies V1 API version: '1.0' contact: name: Kyckr APIs email: support@kyckr.com servers: - url: https://rest.kyckr.com description: Production - url: https://rest.kyckr.com/test description: Test security: - apiKey: [] tags: - name: Account - name: Company Profile - name: Company Search - name: Price - name: Registry Documents - name: UBO Verify - name: Lite paths: /core/company/number-search/{countryISO}/{companyNumber}: parameters: - $ref: '#/components/parameters/countryISO' - $ref: '#/components/parameters/companyNumber' get: tags: - Company Search summary: Search by Registration Number description: >- Validating a company registration number in a chosen registry. You will need the company registration number and ISO country code of the registry. From this you will be able to determine if the company exist in the chosen registry and if the company number you"ve been provided is valid. operationId: Company_CompanySearchByNumber parameters: - $ref: '#/components/parameters/regAuth' - $ref: '#/components/parameters/orderRef' responses: '200': $ref: '#/components/responses/CoreSearch' components: parameters: countryISO: name: countryISO description: 2-digit ISO country code in: path required: true schema: type: string example: IE companyNumber: name: companyNumber in: path required: true schema: type: string description: Registration number of the company you are searching for example: GB12485372 regAuth: name: regAuth in: query schema: type: string description: Registration Authority string from search query example: ITTO orderRef: name: orderRef in: query schema: type: string description: Optional client order reference example: kyckr_order_123 responses: CoreSearch: description: Example response content: application/json: schema: $ref: '#/components/schemas/CoreSearchResultList' examples: Example: $ref: '#/components/examples/CoreSearchResult' schemas: CoreSearchResultList: type: object properties: companiesField: type: array items: $ref: '#/components/schemas/CoreSearchResult' transactionIdField: type: string responseCodeField: type: number responseDetailsField: {} continuationKeyField: {} CoreSearchResult: type: object properties: addressesField: type: array items: $ref: '#/components/schemas/AddressObject' codeField: type: string companyIDField: type: string deprecated: true description: Deprecated - use registrationNumberField instead dateField: type: string format: date-time legalFormField: type: string legalStatusField: type: string nameField: type: string officialField: type: boolean deprecated: true registrationAuthorityField: type: string registrationAuthorityCodeField: type: string registrationNumberField: type: string description: Company registration number issued by the registrationAuthority registrationTypeField: type: string description: >- If present, indicates that the original foundational legal entity registration is at another register (the source register). registrationTypeDetailsField: type: object description: >- Additional details in relation to the registration type, if registrationTypeField is set. properties: originalCodeField: type: string description: Non standard code for the source registry. originalDescriptionField: type: string description: Description text for the source registry. normalizedCodeField: type: string description: >- ISO code for the country, province or state of the source registry. normalizedDescriptionField: type: string description: Country and state description of the foreign registry. isPreviousNameField: type: boolean description: >- Returns whether the search result corresponds to a previous name of the company. Only relevant for name searches. otherIdentifiers: type: array description: Additional identifiers with their standardized type codes items: $ref: '#/components/schemas/Identifier' AddressObject: type: object properties: countryField: type: string description: Country lineField: type: array deprecated: true items: type: object deprecated: true properties: lineField: type: string deprecated: true typeField: type: string description: Address Type typeCodeField: type: string description: Address Type Code addressInOneLineField: type: string description: Full address concatenated in one line addressLine1Field: type: string description: 1st Line of Address addressLine2Field: type: string description: 2nd Line of Address addressLine3Field: type: string description: 3rd Line of Address addressLine4Field: type: string description: 4th Line of Address addressLine5Field: type: string description: 5th Line of Address postcodeField: type: string description: Postal Code cityTownField: type: string description: City or Town regionStateField: type: string description: Region or State Identifier: title: Identifier type: object description: A standardized identifier with its type code properties: value: type: string description: The identifier value example: NA0091712 type: type: string description: The standardized type code for this identifier examples: CoreSearchResult: value: companiesField: - addressesField: - addressInOneLineField: ARC LABS RESEARCH CENTER,WIT WEST CAMPUS WATERFORD 999940 codeField: '436024' nameField: KYCKR IRELAND LIMITED officialField: false transactionIdField: '8305906' responseCodeField: 0 securitySchemes: apiKey: type: apiKey name: Authorization in: header ````