1. What is a DID number and how does it work in India?

A DID (Direct Inward Dialling) number routes inbound calls directly to a SIP endpoint, contact centre, IVR, softphone, or mobile number without requiring a physical phone line at the number's location. An Indian DID Numbers provider hosts city-specific numbers under a DoT-issued telecom licence and delivers calls over SIP to your configured destination. The caller experiences a normal phone call, while your business gains a local presence in any Indian city without opening an office there. Most Indian DID Numbers service providers let you manage numbers through a web dashboard or API.