DoT License

What is a DoT License?

A DoT license is an authorization issued by India’s Department of Telecommunications that permits an entity to operate specific telecom services or use telecom resources, such as bulk voice or SMS infrastructure, for business purposes. Certain categories of businesses, particularly call centers and BPOs using telecom resources at scale, are required to hold this authorization, most commonly through Other Service Provider (OSP) registration.

OSP registration, the most common form for contact centers

Other Service Provider (OSP) registration applies to businesses that provide services like call centers, telemarketing, or BPO operations using telecom network resources. It’s obtained through the Saral Sanchar portal, DoT’s centralized registration system, and is generally simpler and faster than a full telecom operator license, since OSPs are using telecom infrastructure rather than building or operating it themselves.

Why this matters for businesses running contact centers

• Legal operation: running a call center or BPO using bulk telecom resources without proper registration can expose a business to regulatory penalties.
• Vendor and platform requirements: many telecom and cloud communication providers require proof of OSP registration before provisioning certain services at scale.
• International vs. domestic distinctions: DoT rules historically distinguished between domestic and international OSPs, with somewhat different compliance requirements for each, though this has been simplified over recent years.

Use cases

• Domestic and international call centers handling customer support or telemarketing at scale.
• BPOs providing outsourced voice services to other businesses.
• Businesses building large in-house contact center operations that rely on significant telecom infrastructure.

Practical takeaway

Any business planning to run a sizeable voice-based operation in India, whether in-house or as a service provider to others, should confirm early whether OSP or another DoT registration applies to their specific setup, since retrofitting compliance after a large operation is already running tends to be far more disruptive than registering upfront.