Today’s internet is made up of more than 48 000 networks, mostly operated by private actors. Together, they produce connectivity – a good they all depend upon when doing business. In order to establish connectivity these competitors need to cooperate. Internet exchanges offer technical facilities for networks to "meet" and exchange traffic. It is argued that internet exchanges have a specific disposition to act as organisers that facilitate the cooperation. This disposition and their organisational practices are analysed through the lens of concepts that are rooted in the economics of convention.