After the Supreme Court’s 2021 decision in Facebook, Inc. v. Duguid, equipment qualifies as an autodialer under the federal Telephone Consumer Protection Act only if it has the capacity to store or produce telephone numbers using a random or sequential number generator, and then dial them. A system that pulls numbers from a pre-existing list and dials them automatically, no matter how fast or how automated, is not an automatic telephone dialing system under federal law. That single distinction now decides whether a caller needed prior express consent before the call went out, and whether $500 to $1,500 per call is on the table.
The Rule the Supreme Court Set
The statute defines an ATDS as equipment with the capacity “(A) to store or produce telephone numbers to be called, using a random or sequential number generator; and (B) to dial such numbers.”1Office of the Law Revision Counsel. 47 USC 227 – Restrictions on Use of Telephone Equipment For years, federal appeals courts split on whether the phrase “using a random or sequential number generator” modified only “produce” or also “store.” The broader reading would have swept in almost any device that stored contacts and dialed them, including smartphones.
Justice Sotomayor, writing for eight justices, held that the modifier applies to both verbs. A random or sequential number generator must be involved in either function for the equipment to qualify. Facebook’s login-notification system pulled numbers from a stored database and sent automated alerts. Because no generator was involved, it was not an ATDS. The Court rejected the broader reading as absurd, noting that Congress targeted equipment capable of dialing random or sequential blocks of numbers, not every device with a contact list and a send button.2Supreme Court of the United States. Facebook, Inc. v. Duguid, 593 U.S. ___ (2021)
Present Capacity Is What Courts Look At
Post-Duguid courts focus on what the equipment can do right now, not what it could theoretically be reprogrammed to do. If a system would need a significant software overhaul or new code to generate random or sequential numbers, it lacks the “capacity” the statute contemplates. Judges look at the software architecture, the actual code running when the calls went out, and how numbers entered the dialing queue.
The distinction matters because many platforms are technically flexible. A cloud-based dialing tool might be capable of integrating a random number generator module, but if that module is not installed and active during the calls at issue, the system does not qualify. Courts are not interested in what a developer could build. They want to know what the system did.
What Doesn’t Qualify as an Autodialer
Most business communication tools now sit outside the federal ATDS definition:
- Predictive dialers: These systems use algorithms to anticipate when an agent will be free and dial the next number from a pre-loaded list. The numbers come from a database rather than a generator, so predictive dialers generally fall outside the definition.
- CRM-based dialers: Platforms that pull contact information from a lead list or customer database and dial automatically are not generating numbers. The speed of the dialing is irrelevant if the source is a fixed dataset.
- Automated notification systems: Tools that send appointment reminders, delivery alerts, or account notifications by working through a predetermined set of numbers lack the generative component.
- Click-to-dial tools: Systems where an agent selects a specific contact and clicks to initiate the call involve direct human selection of each number, the opposite of automated number generation.
The Footnote 7 Argument
The Duguid opinion included a footnote that has generated its own line of litigation. The Court offered a hypothetical: an autodialer might use a random number generator to determine the order in which to pick phone numbers from a pre-existing list, then store those numbers for later dialing. The footnote was meant to explain why the word “store” is not redundant in the statute. Plaintiffs’ lawyers seized on it to argue that any system using randomized selection from a database should qualify as an ATDS.
Most federal appeals courts that have addressed the argument have rejected it. The prevailing view is that the hypothetical described a system where the numbers were originally generated randomly or sequentially before being stored, not one that simply shuffles a normally compiled contact list. Reading Footnote 7 the other way would contradict the decision’s central holding: that a device which merely stores and dials phone numbers is not an autodialer.2Supreme Court of the United States. Facebook, Inc. v. Duguid, 593 U.S. ___ (2021) The issue is still worth watching. If a circuit court eventually adopts the broader reading, systems that randomize the order of a pre-loaded contact list could face renewed scrutiny.
Non-ATDS Systems Still Face TCPA Rules
Concluding that a dialing system is not an ATDS does not remove it from the TCPA. The statute independently restricts calls using “artificial or prerecorded voice” messages to cell phones, regardless of whether the equipment qualifies as an autodialer.1Office of the Law Revision Counsel. 47 USC 227 – Restrictions on Use of Telephone Equipment
In February 2024, the FCC issued a declaratory ruling confirming that AI-generated voices fall within this prohibition. Voice cloning and other AI tools that simulate a human voice are treated as “artificial voices” under the statute. Callers must obtain prior express consent before using them, whether or not the dialing system is an ATDS.3Federal Communications Commission. Implications of Artificial Intelligence Technologies on Protecting Consumers from Unwanted Robocalls and Robotexts (Declaratory Ruling) Do Not Call registry obligations also apply independently of ATDS status.4Federal Communications Commission. Do Not Call
State law is a separate track. Several states define autodialers far more broadly than federal law, regulating any “automated system for the selection and dialing of telephone numbers” with no mention of a random or sequential number generator. Under those statutes, a system that pulls a number from a database and dials it can trigger liability even though the same equipment is fine under Duguid. Some states also impose operational requirements on automated dialing equipment, including advance written notifications to local carriers, automatic disconnect rules, and time-of-day restrictions. A company running high-volume campaigns across state lines needs to map the autodialer definitions in every state it calls into, not just clear the federal test.
Why the Classification Is Worth Getting Right
The federal statute provides $500 per violation, and courts can triple that to $1,500 per call or text if the violation was willful or knowing.1Office of the Law Revision Counsel. 47 USC 227 – Restrictions on Use of Telephone Equipment Those figures apply regardless of whether the consumer suffered any actual harm. A single campaign sending 50,000 texts without proper consent carries exposure of $25 million to $75 million before a class certification motion is filed.
As of 2025, roughly four out of five TCPA lawsuits are filed as class actions, and settlements in the $10 million to $50 million range are common. The largest recorded TCPA settlement reached $76 million in 2024. Duguid gave defendants a strong tool to defeat ATDS-based claims by demanding proof of a random or sequential number generator, but plaintiffs have adapted. Many complaints now focus on prerecorded voice violations, Do Not Call violations, or state-law claims that do not require proving the equipment is an ATDS. The decision narrowed one doorway into the statute. It did not close the building.