This article presents a conceptual model based on social‐network measures to capture how regulatory decisions are made at the de facto level, using data from Colombia's telecommunications sector. “De facto” means how decision making takes place in practice and how the actors involved in the process perceive it. The data is the product of a social‐ network analysis survey applied to the actors involved in the country's telecommunications sector. The results suggest that in the case of Colombia, the decision‐making process functions as a sparse or fragmented network where there are few central actors in a very influential position. We find that while the sector regulator and the telecommunications ministry influence decisions, market operators, trade organizations, and the competition authority have similar leverage in the decision‐making process. This article contributes to recent research on regulatory governance that has shown that sector regulators must interact with other organizations when making regulatory decisions, and these interactions occur at the de facto level. It offers a way to conceptualize these interactions and presents data from a region not often studied.