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MMS Media Guidelines
MMS Media Requirements & Best Practices This article outlines the supported media types, file size limits, formatting requirements, and creative best practices for sending MMS (Multimedia Messaging Service) messages through most mobile carriers. ...
LRN (Number Intelligence) API
The Pronto LRN API will allow you to scrub your lists prior to sending SMS or MMS messages. It will allow you to determine if a number is a wireless number or not, capable of receiving a message or not and who the carrier is. The API endpoint is: ...
RND - Reassigned Numbers Database API
The RND API may be used to scrub your lists to determine if a number has been disconnected or is still assigned to the consumer that you intend to contact. From the FCC: "The FCC's Reassigned Numbers Database (RND) is designed to prevent a consumer ...