FCC’s DNO ruling: A game-changer in call blocking and consumer protection

In 2025, the FCC took a decisive step to strengthen consumer protection by enhancing rules around call blocking. Building on previous regulations, the new ruling requires communications service providers (CSPs), including gateway providers, to block voice calls based on a reasonable Do Not Originate (DNO) list, a powerful tool in the fight against illegal robocalls and call spoofing.

What Is a DNO List and Why It Matters

A DNO list is a database of phone numbers that should never be used to initiate outbound calls. These numbers include:

• Invalid numbers: Not valid under the North American Numbering Plan (NANP).
• Unallocated numbers: Valid NANP numbers not assigned to any provider.
• Unused numbers: Allocated but not currently in use.
• Inbound-only numbers: Numbers designated for inbound calls only, at the subscriber’s request.

Calls originating from these numbers are almost certainly illegal and blocking them ensures they never reach consumers—preserving trust and reducing fraud.

TruNumber Protect: Elevating Your DNO Strategy

To meet these new requirements and go beyond basic compliance, CSPs can leverage iconectiv TruNumber Protect, an authoritative database of high-risk numbers. It includes:

• Invalid number ranges
• Unallocated number ranges
• International Premium Rate Numbers (IPRN)

By integrating TruNumber Protect into existing fraud management systems, CSPs can proactively block suspicious calls, protect customers, and safeguard business operations while enhancing compliance with the FCC’s DNO regulations.

Why It Matters for CSPs

• Enhance customer trust by blocking scam calls.
• Ensure regulatory compliance with FCC DNO mandates.
• Strengthen fraud prevention with authoritative, real-time data.
• Protect brand reputation by delivering a safer communication experience.

The bottom line: The FCC’s 2025 ruling isn’t just a regulatory update, it’s an opportunity for CSPs to lead in consumer protection. With tools like TruNumber Protect, CSPs can stay ahead of fraud, build trust and deliver secure, reliable voice services.