The Campaign Registry | 3,109 followers on LinkedIn. The Campaign Registry is the reputation authority for commercial 10DLC messaging campaigns | We work with North American mobile operators and companies that are in the messaging business to register Application-to-Person (A2P)text messaging Campaigns. The registry supports a sanctioned A2P 10 Digit Long Code (10DLC) text messaging Campaign ecosystem and provides visibility into the messaging source and content, allowing mobile carriers to provide a more reliable and simple messaging service for Campaign Service Providers (CSPs) and Brands