3CX is not affected by these actions but your non-compliant SIP trunk provider may be!

August 2025, the Federal Communications Commission (FCC) announced the removal of more than 1200 VoIP providers from its Robocall Mitigation Database (RMD). These providers were found to have unresolved deficiencies in their certification filings.

This ruling may impact customers who rely on unsupported SIP trunk providers. It’s important to stress that 3CX itself is not affected, the action targets providers who failed to comply with FCC regulations.

What is the Robocall Mitigation Database (RMD) and Why Does it Matter?

The RMD is a cornerstone of the FCC’s efforts to protect consumers from unwanted and fraudulent robocalls. It is a mandatory registry for every voice service provider (including VoIP) handling calls with U.S. numbers.

To be listed, providers must file a certification confirming they are:

  • Actively preventing illegal robocalls – taking concrete steps to block fraudulent traffic.
  • Implementing STIR/SHAKEN – utilizing call authentication technology or an approved alternative.
  • Cooperating with investigations – working with authorities to trace and stop the sources of illegal calls.

Bottom line: If a provider isn’t in the RMD, U.S. carriers are required to block their calls. This effectively cuts them off from the U.S. phone network.

What This Means for 3CX Customers

If your current VoIP provider is among those removed from the RMD, you may face:

  • Failed inbound and outbound calls, calls won’t complete.
  • Sudden loss of service, your trunk may stop working without warning.
  • Interconnectivity issues, problems connecting with U.S. carriers and other networks.

It’s important to understand: 3CX is not affected by these actions.

3CX provides the communication platform, while regulatory compliance is the responsibility of each SIP trunk provider.

We have already seen cases where customers using non-compliant providers experienced disruptions, the root cause lies with the provider, not 3CX.

What You Should Do Now

  1. Check the FCC’s Official List see the FCC announcement and full provider list here.
  2. If you are unsure, contact your provider directly and ask them to confirm their compliance status.
  3. Switch to a Certified 3CX Supported SIP Trunk. See the list of 3CX tested and supported SIP trunks here.