Research · 7 min read

The Two Do-Not-Call Lists, and How Long a Seller May Keep Calling

One list is national and one belongs to the company. A federal rule also lets a seller call a registered number for 540 days after a purchase, and for 90 days after a mere inquiry.

Key takeaways

  • The rule references two lists: the Commission's national registry, which has exceptions, and the seller's own list, which the rule states without exceptions.
  • An established business relationship runs 540 days from a purchase or financial transaction, and 90 days from a mere inquiry or application — and it does not override a person's request to the seller to stop calling.
  • The alternative route onto a registered number is a written express agreement naming the specific party, the number to be called, and the person's signature.
  • A compliant campaign dials against a version of the registry obtained from the Commission no more than 31 days before the call, and keeps records of which version was used and when.
  • Calls to a residence are limited to 8:00 a.m. to 9:00 p.m. local time at the recipient's location, and a call is abandoned if a live representative is not connected within two seconds of the greeting.
  • Prerecorded sales calls require a signed written agreement obtained after a clear and conspicuous disclosure and never as a condition of purchase, with an exception in the rule for prerecorded healthcare messages from a HIPAA covered entity or its business associate.

Answer first: two lists, and the company one is the stronger of the pair

The Telemarketing Sales Rule, 16 CFR part 310, refers to two different registries in the same subsection, and they do different jobs. Section 310.4(b)(1)(iii) makes it an abusive practice to initiate an outbound telephone call to a person when either "That person previously has stated that he or she does not wish to receive an outbound telephone call made by or on behalf of the seller," or "That person's telephone number is on the 'do-not-call' registry, maintained by the Commission."

The first of those is the company-specific list. It is created by a person saying so, to the company, and the rule attaches no exceptions to it. The second is the national registry, and the rule attaches two exceptions to it — described below — which is why a number on the national registry can still ring.

The rule also prohibits obstructing the first list. Section 310.4(b)(1)(ii) forbids "Denying or interfering in any way, directly or indirectly, with a person's right to be placed on any registry," and then names the specific tactics: "harassing any person who makes such a request; hanging up on that person; failing to honor the request; requiring the person to listen to a sales pitch before accepting the request; assessing a charge or fee for honoring the request; requiring a person to call a different number to submit the request; and requiring the person to identify the seller making the call or on whose behalf the call is made."

That last item is easy to miss and useful to know. A company may not condition an opt-out on the caller correctly naming which seller is behind the call.

The 540-day and 90-day windows

The national registry has an exception for an existing relationship, and the rule puts a number on how long that relationship lasts. Section 310.4(b)(1)(iii)(B)(2) permits a call to a registered number where the seller "Can demonstrate that the seller has an established business relationship with such person, and that person has not stated that he or she does not wish to receive outbound telephone calls" under the company-specific provision.

Section 310.2(q) then defines the relationship, and defines it twice. It means a relationship based on "The person's purchase, rental, or lease of the seller's goods or services or a financial transaction between the person and seller, within the 540 days immediately preceding the date of a telemarketing call," or on "The person's inquiry or application regarding a good or service offered by the seller, within the 90 days immediately preceding the date of a telemarketing call."

Those two windows are the practical answer to why a registered number rings. A purchase opens roughly eighteen months. An inquiry — filling in a form, starting an intake, asking about a price — opens three months, with no purchase required at all.

The other exception is written consent. A seller may call a registered number where it "Can demonstrate that the seller has obtained the express agreement, in writing, of such person to place calls to that person," and the rule specifies what that writing must contain: it "shall clearly evidence such person's authorization that calls made by or on behalf of a specific party may be placed to that person, and shall include the telephone number to which the calls may be placed and the signature of that person." A footnote to the rule states that "signature" includes an electronic or digital form of signature to the extent recognized as valid under applicable federal or state contract law.

Note the ordering in the relationship exception. The company-specific request wins. A person who has told the seller to stop is not callable on the strength of a purchase made within the previous 540 days.

The safe harbor, and the 31-day scrub

Section 310.4(b)(3) sets out what a seller must have in place to avoid liability for a stray call. It is a list of six conditions, all of which describe routine business practice rather than a defense assembled after the fact.

The seller must have "established and implemented written procedures" to comply; must have "trained its personnel, and any entity assisting in its compliance" in those procedures; must have "maintained and recorded a list of telephone numbers the seller or charitable organization may not contact"; must monitor and enforce compliance with the procedures; and the offending call must be "the result of error and not of failure to obtain any information necessary to comply" with an opt-out request.

The fourth condition carries the number worth remembering. The seller must use "a process to prevent telemarketing to any telephone number on any list" of that kind, "employing a version of the 'do-not-call' registry obtained from the Commission no more than thirty-one (31) days prior to the date any call is made," and must maintain records documenting the process. Thirty-one days is the outer age of the list a compliant campaign is dialing against.

Recordkeeping backs this up. Section 310.5(a)(10) requires a record of each person who has asked not to be called, including "the name of the person, the telephone number(s) associated with the request, the seller or charitable organization from which the person does not wish to receive calls, the telemarketer that called the person, the date the person requested that she cease receiving such calls, and the goods or services the seller was offering." Section 310.5(a)(11) separately requires a record of which version of the registry was used, the date it was accessed, the subscription account number, and the campaign it was accessed for.

Section 310.4(b)(2) closes a side door: it is an abusive practice for anyone "to sell, rent, lease, purchase, or use" any of these lists "for any purpose except compliance with the provisions of this part or otherwise to prevent telephone calls to telephone numbers on such lists." A do-not-call list is not a marketing list.

Hours, dead air, and recorded messages

Three further provisions in § 310.4 govern the shape of a call rather than whether it may be placed at all.

Hours are fixed. Section 310.4(c) makes it abusive, "Without the prior consent of a person," for a telemarketer "to engage in outbound telephone calls to a person's residence at any time other than between 8:00 a.m. and 9:00 p.m. local time at the called person's location." The clock that matters is the recipient's, not the caller's.

Silence on answering is regulated with a stopwatch. Section 310.4(b)(1)(iv) makes it abusive to abandon an outbound call, and defines abandonment: a call "is 'abandoned' under this section if a person answers it and the telemarketer does not connect the call to a sales representative within two (2) seconds of the person's completed greeting." A safe harbor at § 310.4(b)(4) permits abandonment of "no more than three (3) percent of all calls answered by a person, measured over the duration of a single calling campaign, if less than 30 days, or separately over each successive 30-day period," and requires the phone to ring "for at least fifteen (15) seconds or four (4) rings before disconnecting an unanswered call."

Prerecorded sales messages require a signed written agreement obtained in advance. Section 310.4(b)(1)(v)(A) requires an express written agreement that the seller "obtained only after a clear and conspicuous disclosure that the purpose of the agreement is to authorize the seller to place prerecorded calls," that the seller "obtained without requiring, directly or indirectly, that the agreement be executed as a condition of purchasing any good or service," that evidences willingness to receive such calls from a specific seller, and that includes the person's telephone number and signature.

Where such a call is permitted, the message must carry an opt-out. Within two seconds of the greeting the recording must give the § 310.4(d) disclosures and then tell the person that an "automated interactive voice and/or keypress-activated opt-out mechanism" is available at any time during the message, which must "Automatically add the number called to the seller's entity-specific Do Not Call list," "Once invoked, immediately disconnect the call," and "Be available for use at any time during the message." For a call reaching voicemail, a toll-free number connecting to the same mechanism must be given.

One carve-out belongs in a health context and is stated in the rule itself: the prerecorded-message provision "shall not apply to any outbound telephone call that delivers a prerecorded healthcare message made by, or on behalf of, a covered entity or its business associate, as those terms are defined in the HIPAA Privacy Rule, 45 CFR 160.103."

Where the boundaries of this rule sit

Two limits are worth stating plainly, because they explain calls that arrive anyway.

The first is scope. As set out in the companion article on what a sales call must disclose, § 310.6 exempts calls a customer initiates that are not the result of a solicitation, and calls a customer initiates in response to an advertisement in a medium other than direct mail — subject in both cases to the rule's upselling carve-out. The do-not-call provisions live in a rule whose reach is defined by that scope.

The second is that this is one of two federal regimes. The Telemarketing Sales Rule is the Federal Trade Commission's, issued under the Telemarketing and Consumer Fraud and Abuse Prevention Act, 15 U.S.C. 6101-6108, which the rule prints as its own authority. A separate set of rules issued by the Federal Communications Commission under a different statute also governs telephone solicitations. This page does not describe those rules and does not compare them; it describes the FTC's.

Section 310.6(a) also removes charitable solicitations from the national registry provision specifically: "Solicitations to induce charitable contributions via outbound telephone calls are not covered by § 310.4(b)(1)(iii)(B)." The company-specific list still applies to them.

Finally, the caller-identification rule sits in the same section as the do-not-call provisions. Section 310.4(a)(8) makes it abusive to fail to transmit "the telephone number, and, when made available by the telemarketer's carrier, the name of the telemarketer, to any caller identification service in use by a recipient," while permitting substitution of "the name of the seller" together with "the seller's or charitable organization's customer or donor service telephone number, which is answered during regular business hours." A blocked number on a sales call is not what this rule contemplates.

Sources

  1. 16 CFR Part 310 — Telemarketing Sales Rule (§ 310.2(q) Established business relationship; § 310.4(a)(8), (b) and (c) Abusive telemarketing acts or practices; § 310.5(a)(10)-(11) Recordkeeping; § 310.6(a) Exemptions)Federal Trade Commission, via the Electronic Code of Federal Regulations (eCFR) versioner API · Source note printed on the part: 75 FR 48516, Aug. 10, 2010, as amended through 89 FR 99075, Dec. 10, 2024 · Retrieved September 2026The two do-not-call provisions at § 310.4(b)(1)(iii)(A) and (B); the list of prohibited obstruction tactics at § 310.4(b)(1)(ii); the written express agreement requirements including the telephone number and signature, and the electronic-signature footnote; the 540-day and 90-day established business relationship definitions at § 310.2(q); the six safe-harbor conditions at § 310.4(b)(3) including the 31-day registry version; the prohibition on selling, renting or using do-not-call lists at § 310.4(b)(2); the 8:00 a.m. to 9:00 p.m. calling window at § 310.4(c); the two-second abandonment definition and the three-percent, fifteen-second safe harbor at § 310.4(b)(1)(iv) and (b)(4); the prerecorded-message written-agreement requirements and opt-out mechanism specifications at § 310.4(b)(1)(v), including the exclusion for prerecorded healthcare messages from a HIPAA covered entity or business associate; the caller-identification transmission requirement at § 310.4(a)(8); the opt-out and registry-version recordkeeping at § 310.5(a)(10)-(11); the charitable-solicitation carve-out at § 310.6(a); and the part's printed authority line, 15 U.S.C. 6101-6108.

Frequently asked questions

What is the difference between the national registry and a company list?

The national registry is maintained by the Commission and appears at § 310.4(b)(1)(iii)(B), which carries two exceptions — written express agreement, and an established business relationship. The company-specific list at § 310.4(b)(1)(iii)(A) is created when a person tells a seller they do not wish to receive its calls, and the rule attaches no exceptions to it.

How long can a seller call after a purchase?

Section 310.2(q) defines an established business relationship as one based on a purchase, rental, lease or financial transaction within the 540 days immediately preceding the call. A separate branch of the same definition covers an inquiry or application regarding a good or service within the 90 days immediately preceding the call, with no purchase required.

Does an opt-out override an existing relationship?

The rule's text puts the company-specific request first. The established-business-relationship exception applies only where the seller can demonstrate the relationship and "that person has not stated that he or she does not wish to receive outbound telephone calls" under the company-specific provision.

May a company make someone jump through hoops to opt out?

Section 310.4(b)(1)(ii) names the tactics it prohibits: harassing the person, hanging up, failing to honor the request, requiring them to listen to a sales pitch first, charging a fee, requiring them to call a different number, and requiring them to identify the seller making the call or on whose behalf it was made.

What hours are permitted?

Section 310.4(c) restricts outbound calls to a person's residence to between 8:00 a.m. and 9:00 p.m. local time at the called person's location, absent that person's prior consent.

What counts as an abandoned call?

A call is abandoned under § 310.4(b)(1)(iv) if a person answers it and the telemarketer does not connect the call to a sales representative within two seconds of the person's completed greeting. A safe harbor permits abandonment of no more than three percent of answered calls measured over a campaign of under 30 days, or over each successive 30-day period.