FCC mandates call blocking using a Do-Not-Originate list

The FCC adopted an order that requires all providers in the call path to block calls using a reasonable Do-Not-Originate (DNO) list. Let’s have a look.

The problem

Fraudsters often target their intended victims with phone calls that spoof the calling number. They use a calling number that belongs to a well-known organization, such as a government department or utility company, to gain the trust of the called party.

Sometimes the organization with a legitimate possession of that number uses it only for inbound calls. They never make outbound calls from that number. If you get a call from that number, it must be a scam.

But how would you know?

Solutions

The organization can protect consumers, and their reputation, by putting their inbound-only numbers on DNO lists. Examples of such lists include:

• The Industry Traceback Group’s ITG DNO Registry
• The Somos RealNumber^® dataset.

Voice service providers can use these DNO lists, or others, to analyze calls that transit their networks and check whether the calling number is on a DNO list.

The mandate

In the Eighth Report and Order, the Commission requires all providers in the call path to perform DNO blocking on all calls that transit their networks. This rule applies to the origination, transit, and termination of calls.

The rule does not mandate the use of a specific list but allows providers to use any DNO list as long as it’s reasonable. The rule gives providers the flexibility “to adapt or customize their DNO list based on their customer base, traffic profile, and other reasonable considerations.”

At a minimum, a reasonable DNO list must include the following:

1. Any inbound-only government numbers where the government entity has requested that the number be included
2. Private inbound-only numbers that have been used in imposter scams, when a request is made by the private entity assigned such a number.

Deadline

This rule will become effective 90 days after publication in the Federal Register of a notice of approval by the Office of Management and Budget (OMB). The OMB is required to review such rules by the Paperwork Reduction Act.

More information

• Eighth Report and Order on robocalls, CG Docket No. 17-59
• TransNexus Do-Not-Originate blocking solution

TransNexus solutions

TransNexus is a leader in developing innovative software to manage and protect telecommunications networks worldwide. The company has over 25 years of experience in providing telecom software solutions including toll fraud prevention, robocall mitigation and prevention, CDR and call analytics, advanced call routing, billing support, STIR/SHAKEN, and branded calling.

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