10DLC: 10-Digit Long Code
A2P Messaging: Application-to-person messaging is the process of sending mobile messages from an application, online platform, to a mobile user.
Carrier blocking: the carrier use of systems that attempt to block SMS traffic that violates carrier compliance rules.
Short code: a 5 or 6-digit SMS-only number that is provisioned directly with the carrier network
MMS-Inc: Mobile Messaging Solutions, Inc.
MO: Mobile Originated. A message received from a mobile phone to an application.
MT: Mobile Terminated. A message sent to a mobile phone from an application.
NANP: North American Number Plan
SMS: Short Message Service, also known as “text-messaging”.
Toll-Free Number: a 10-digit number with specific toll-free prefix (800, 888, 877, etc.)
Transport Code or Transportcode: term for the number used as the originator or senderID of an SMS application