FCC Proposes Overhaul of Telephone Numbering Policies to Fight Illegal Robocalls

​On March 5, 2026, the Federal Communications Commission (FCC) released a draft Notice of Proposed Rulemaking (NPRM) titled Combatting Illegal Robocalls Through FCC Numbering Policies, placing it on the tentative agenda for the March 26, 2026 Open Commission Meeting.

The NPRM, docketed under WC Docket Nos. 26-49, 20-67, 13-97, and 07-243, proposes significant changes to how telephone numbering resources are utilized, reported, and resold by voice service providers and opens up a new front in the FCC's long-running campaign against illegal robocalling.

Background: Why Numbering Policies Matter in the FCC Robocall Fight

The relationship between telephone numbering resources and illegal robocalls is well-documented. Bad actors exploit the North American Numbering Plan (NANP) by obtaining large quantities of phone numbers, often through extended chains of resellers, to conduct illegal robocall campaigns. When numbers are flagged or blocked by call analytics engines, these actors simply cycle through fresh numbers, a practice sometimes referred to as "snowshoeing."

The FCC has progressively tightened its numbering policies over recent years. In 2023, the Commission adopted its Second Report and Order mandating that new interconnected VoIP providers seeking direct access to numbering resources file robocall-related certifications, ownership disclosures, and public safety attestations. In December 2025, the FCC expanded those requirements to all holders of direct numbering authorizations through a Third Report and Order, with rules published in the Federal Register on February 17, 2026, and an effective date of March 19, 2026.

The March 2026 NPRM builds on this foundation by targeting the mechanics of how numbering resources flow through the telecommunications ecosystem.

Key Proposals in the Draft FCC NPRM

Addressing Number Rotation and Cycling

One of the most consequential elements of the NPRM is its focus on number rotation or cycling, commonly referred to in the industry as "snowshoeing*." The practice involves rapidly changing the outbound caller ID numbers used to place calls, making it difficult for call analytics engines and carriers to identify and block bad traffic.

The FCC has expressed concern that number cycling facilitates illegal robocalling and seeks comment on whether the practice should be banned outright. However, the NPRM acknowledges a significant complication: legitimate callers also engage in number rotation as an effective and necessary countermeasure to erroneous call blocking. In a 2023 survey of 300 business leaders, call analytics company Hiya reported that 60% said they rotate numbers at least multiple times per month, and 29% change their numbers automatically or on a daily basis.

This presents a challenging regulatory question: how to curtail number rotation by bad actors without penalizing the legitimate businesses that engage in the same practice precisely because the robocall mitigation ecosystem is mislabeling their calls. The FCC is seeking comment on the extent of number rotation, the reasons driving it, and whether it can develop rules that distinguish malicious number cycling from legitimate business practices.

Restricting Number Resale to a Single Level

Perhaps the most dramatic proposal in the NPRM is a potential prohibition on multi-level resale of telephone numbers. Currently, it is common practice for resellers of telephone numbers, including providers of Direct Inward Dialing (DID) numbers, to operate as wholesalers, reselling numbering resources to downstream providers who may in turn resell to additional layers of providers before numbers reach end users.

The FCC proposes to limit this chain by requiring that resellers of telephone numbers may only provide retail service to their own end users and may not provide wholesale service. In other words, the NPRM contemplates collapsing the number resale chain to a single level, ending the practice of intermediary wholesaling.

If adopted, this proposal would represent a significant structural change for the telecommunications industry. Many business models in the VoIP and unified communications space rely on multi-tier wholesale-to-retail number provisioning. Industry stakeholders will need to carefully evaluate how such a restriction would affect their operations and service delivery chains.

Enhanced NRUF Reporting for Resellers

The NPRM proposes to overhaul the Number Resource Utilization/Forecast (NRUF) reporting system, with a particular focus on resellers. Currently, NRUF reports are filed primarily by carriers that receive numbering resources directly from the North American Numbering Plan Administrator (NANPA). Resellers generally do not file their own reports, meaning the FCC has limited visibility into how numbering resources are distributed and used further down the chain.

The Commission proposes creating a more robust NRUF reporting framework that would require resellers of telephone numbers to file their own utilization reports, which would give regulators greater transparency into how numbering resources are being deployed and help identify situations where numbers are being warehoused or funneled to entities engaged in illegal robocalling.

Extending Robocall Mitigation Certification Obligations

Building on recent certification requirements for VoIP providers with direct numbering authorizations, the NPRM proposes to extend robocall-related certification obligations to two additional categories of providers:

1. All service providers directly receiving numbering resources from NANPA, regardless of their service delivery method or regulatory classification; and
   
2. Resellers of telephone numbers, as a one-time obligation.

Under the proposal, current service providers receiving numbering resources directly from NANPA, as well as resellers operating as of the effective date of any new rule, would be required to file the required certifications within 30 days. Service providers seeking numbering resources for the first time, or resellers intending to begin operations, would need to file at least 30 days before submitting their first request for numbers or commencing resale operations, respectively.

This proposal aims to ensure that every entity in the numbering resource supply chain has made the same robocall-related disclosures, certifications, and attestations, closing potential gaps that bad actors have exploited.

Relationship to Other Pending FCC Proceedings

The Combatting Illegal Robocalls Through FCC Numbering Policies NPRM does not exist in isolation. It is part of a constellation of FCC robocall initiatives that, taken together, represent one of the most aggressive regulatory campaigns in the agency's history:

• Numbering Policies for Modern Communications: Adopted in December 2025, this proceeding expanded certification requirements for all VoIP providers with direct numbering authorizations and sought comment on reclaiming numbering resources from providers with revoked authorizations and restricting authorizations for entities posing national security risks. Comments on the FNPRM were due March 16, 2026, with reply comments due April 13, 2026.
  
• Robocall Mitigation Database Enhancements: The FCC strengthened RMD rules effective February 5, 2026, including enhanced forfeiture amounts ($10,000 for false information, $1,000/day for untimely updates), annual recertification requirements, multi-factor authentication, and a $100 filing fee (not yet effective). The first annual recertification deadline passed on March 1, 2026.
  
• MVNO Compliance: On February 20, 2026, the FCC's Enforcement Bureau issued an advisory reminding Mobile Virtual Network Operators (MVNOs) of their obligation to file in the RMD, respond to traceback requests within 24 hours, and include know-your-customer (KYC) processes in their mitigation plans.
  
• Caller Identity Verification FNPRM: In October of 2025, the FCC proposed requiring originating providers to verify and transmit caller identity information using Rich Call Data (RCD), mandating foreign-origin call indicators, and streamlining outdated TCPA rules, including the call abandonment rate rule and revocation-of-consent provisions.
  
• Offshore Call Centers NPRM: Also on the March 26, 2026 agenda, this NPRM proposes actions to address problems with offshore call centers, including measures to encourage onshoring and combat robocall scams originating from foreign call centers.

Industry Implications and Potential Concerns

The proposals in this NPRM, if adopted, would have far-reaching implications across the telecommunications ecosystem:

For DID Providers and Wholesalers: The single-level resale restriction could fundamentally alter the business model for companies that purchase numbers in bulk from carriers or other providers and resell them to downstream customers who further resell or redistribute those numbers. Companies operating in this space will need to evaluate their supply chains and potentially restructure their business relationships.

For Legitimate High-Volume Callers: The potential ban on number rotation raises concerns for businesses that rely on the practice to ensure their calls are completed. Many enterprises, contact centers, and lead generators rotate numbers precisely because analytics engines mislabel their calls as spam or potential fraud. A blanket ban without corresponding reform of call labeling practices could significantly impair legitimate outbound calling operations.

For Small and Mid-Sized Carriers: Expanded NRUF reporting obligations and robocall mitigation certification requirements will impose additional compliance costs, particularly on smaller resellers and service providers that may lack dedicated regulatory compliance staff.

For the Robocall Mitigation Ecosystem: Despite the challenges they present to industry stakeholders, if these proposals are successfully adopted they could meaningfully reduce the supply of numbering resources available to bad actors, making it more difficult and expensive to conduct high-volume illegal robocall campaigns.

What Comes Next

The draft NPRM is scheduled for a vote at the FCC's Open Commission Meeting on March 26, 2026, which is set to convene at 10:30 a.m. ET at the FCC's headquarters. If adopted, the NPRM would open a formal comment period during which industry stakeholders, consumer advocates, state regulators, and other interested parties would have the opportunity to submit their views on the proposed changes.

Whether the Commission can craft rules that effectively target bad actors without imposing disproportionate burdens on legitimate businesses will be the central question as this proceeding moves forward.

Given the breadth of the proposals, particularly the potential ban on number rotation and the single-level resale restriction, the comment period is likely to generate substantial industry engagement. Providers at every level of the numbering resource chain, from NANPA recipients to downstream resellers and end-user service providers, should carefully review the NPRM and prepare to participate in the proceeding.

* The term “snowshoeing” is a metaphor drawn from the physical snowshoe, which distributes a person’s weight across a wide area of snow to prevent them from falling through. In the same way, high-volume callers spread their call or message volume across many different phone numbers to avoid “falling through” detection thresholds.