Google Tag Manager Tag Usage and History

Domain First Detected Last Detected May-16 March-17 May-16 March-17 July-16 July-16 July-16 July-16 October-16 November-17 October-16 November-17 March-17 November-17 July-17 July-17 July-17 August-17 July-17 November-17

Relationship data is generated by looking at the historical usage of identifiers which are generally shared between websites owned/controlled by the same company/individual.

Automate lookups to website relationships via the Relationships API.