In the context of US export controls, ECCN is the abbreviation for Export Control Classification Number. The ECCN is an alphanumeric designation used in the US list of dual-use items (Commerce Control List or CCL) to classify dual-use items.
An ECCN categorizes items based on their nature and technical parameters. The US Export Control Classification Number serves as important criteria in US export controls to check license requirements for exports and reexports.
The contents listed in the ECCNs are mostly identical to descriptions of items in Annex I of the EU Dual-Use Regulation. The dual-use item control list both in the EU and the US are based on decisions taken by international export control regimes (e.g. Wassenaar Arrangement, etc.).