United States
- The Bureau of Industry and Security
- FedWorld Federal Internet Resource Locator
- International Trade Administration
- International Trade Commission
- U.S. Trade Representative
- U.S. Customs and Border Protection
- USDA Animal and Plant Health Inspection Service (APHIS)
Worldwide Customs Authorities – in English
- Australian Customs Service
- Canada Customs & Revenue Agency
- EU DGI (Directorate General for Trade)
- Hong Kong Customs and Excise
- Iceland (General Directorate of Customs)
- India (Central Board of Excise and Customs)
- Ireland (Revenue)
- Japanese Customs
- Jordan (Jordan Customs Dept)
- Korea Customs Service
- NAFTA Customs Web Site
- New Zealand Customs Service
- Organization of American States – Trade Unit
- Pakistan (Central Board of Revenue)
- Singapore Customs
- South Africa (SARS – SA Revenue Service)
- UAE-Dubai Customs
- United Kingdom (H.M. Customs and Excise)
- U.S. Customs and Border Protection
Worldwide Customs Authorities – Not in English
- Austria
- Chile (Servicio Nacional de Aduanas)
- China (General Administration of Customs)
- Colombia (DIAN-Direccion de Impuestos y Aduanas Nacionales)
- Czech Republic (Clo Duane)
- Finland
- France (Douanes & Droits Indirects)
- Germany
- Korea Customs Service
- Netherlands (Belastingdienst Douane)
- Portugal (Alfândegas)
- Spain (Agencia Tributaria)
- Sweden
- Thailand (The Customs Department)