For CE marking, European Union directives mention Market Survelliance Authorities. Each country has its own authority. You can reach the list of Market Survelliance Authorities for Radio Equipment Directive (RED, 2014/53/EU) from this official page of EU:
https://ec.europa.eu/docsroom/documents/37862

In above document, you can see MEMBER STATE Name and address Tel., Fax and E-mail information of the authorities.

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