| Australia | ABN Search |
| Argentina | AFIP Website |
| Belarus | UNP search |
| Bahrain | NBR website |
| Bosnia and Herzegovina | UINO |
| Brasil | CNPJ Search |
| Burundi | BRA |
| European Union(EU) | Vat VIES website |
| United Kingdom(UK) | HMRC VAT Search |
| Canada | GST/HST Search , Canada Business Registry Search |
| Colombia | RUES - Registro Unico Empresarial |
| Czechia | adisspr |
| Chile | RUT |
| Germany | USt-IdNr |
| Georgia | Tax payers registry |
| Greece | Businessportal registry |
| Denmark | CVR Search |
| Iceland | Virðisaukaskattsnúmer |
| India | GSTIN Search |
| Italy | Partita Iva validation, Codice fiscale |
| Netherland | SBI Code search tool, KVK |
| New Zealand | NZBM |
| North Macedonia | Едниствен Даночен Број |
| Norway | Enhetsregisteret |
| Oman | VATIN Search |
| Quebec | QST Search |
| Romania | NAFA website |
| Russia | ИНН |
| Saudi Arabia(KSA) | Zatca website |
| Serbia | ПИБ регистар |
| South Africa | SARS efiling |
| South Korea | hometax vat validation |
| Singapore | UEN or GST Reg No. or NRIC |
| Switzerland | UID register |
| Taiwan | Findbiz |
| Thailand | TAX ID search |
| Turkey | Vergi Kimlik No |
| United Arab Emirates | TRN validation |
| United States | TIN Matching |
| US Tax Exempt Organisations | IRS Tax Exempt Organization Search |
| Texas | Texas Comptroller of Public Accounts |
| Nevada | Nevada Department of Taxation |
| Czechia | VAT search |
| Spain | NIF Search intra-community VAT numbers |