Dialed Number Identification Service (DNIS) allows a VoIP system to recognize the exact number a caller dialed before the call was connected. This is especially useful for businesses that use multiple numbers for different departments, campaigns, or services. With DNIS, the system can route the call based on the dialed number, such as sending support calls to the help desk and sales calls to a different team. It also enables customized greetings or call flows for each number. In contact centers, DNIS can trigger screen pops or pre-fill data for agents, improving efficiency and personalization. DNIS enhances call routing logic, streamlines operations, and ensures that calls are handled in a context-aware manner. It’s a vital tool for multi-channel, multi-service VoIP setups.
What is DNIS?
DNIS (Dialed Number Identification Service) identifies which number a caller dialed, allowing VoIP systems to route or customize responses accordingly.




