Justice SOTOMAYOR delivered the opinion of the Court.
The Telephone Consumer Protection Act of 1991 (TCPA) proscribes abusive telemarketing practices by, among other things, imposing restrictions on making calls with an "automatic telephone dialing system." As defined by the TCPA, an "automatic telephone dialing system" is a piece of equipment with the capacity both "to store or produce telephone numbers to be called, using a random or sequential number generator," and to dial those numbers. 47 U.S.C. § 227(a)(1). The question before the Court is whether that definition encompasses equipment that can "store" and dial telephone numbers, even if the device does not "us[e] a random or sequential number generator." It does not. To qualify as an "automatic telephone dialing system," a device must have the capacity either to store a telephone number using a random or sequential generator or to produce a telephone number using a random or sequential number generator.
In 1991, Congress passed the TCPA to address "the proliferation of intrusive, nuisance calls" to consumers and businesses from telemarketers. § 2, ¶¶1, 6, 105 Stat. 2394, note following 47 U.S.C. § 227. Advances in automated technology made it feasible for companies to execute largescale telemarketing campaigns at a fraction of the prior cost, dramatically increasing customer contacts. Infamously, the development of "robocall" technology allowed companies to make calls using artificial or prerecorded voices, obviating the need for live human callers altogether.
This case concerns "automatic telephone dialing systems" (hereinafter autodialers), which revolutionized telemarketing by allowing companies to dial random or sequential blocks of telephone numbers automatically. Congress found autodialer technology to be uniquely harmful. It threatened public safety by "seizing the telephone lines of public emergency services, dangerously preventing those lines from being utilized to receive calls from those needing emergency services." H. R. Rep. No. 102-317, p. 24 (1991). Indeed, due to the sequential manner in which they could generate numbers, autodialers could simultaneously tie up all the lines of any business with sequentially numbered phone lines. Nor were individual consumers spared: Autodialers could reach cell phones, pagers, and unlisted numbers, inconveniencing consumers and imposing unwanted fees.
Against this technological backdrop, Congress made it unlawful to make certain calls "using any automatic telephone dialing system" to "emergency telephone
Petitioner Facebook, Inc., maintains a social media platform with an optional security feature that sends users "login notification" text messages when an attempt is made to access their Facebook account from an unknown device or browser. If necessary, the user can then log into Facebook and take action to secure the account. To opt in to this service, the user must provide and verify a cell phone number to which Facebook can send messages.
In 2014, respondent Noah Duguid received several login-notification text messages from Facebook, alerting him that someone had attempted to access the Facebook account associated with his phone number from an unknown browser. But Duguid has never had a Facebook account and never gave Facebook his phone number.
Facebook moved to dismiss the suit, arguing primarily that Duguid failed to allege that Facebook used an autodialer because he did not claim Facebook sent text messages to numbers that were randomly or sequentially generated. Rather, Facebook argued, Duguid alleged that Facebook sent targeted, individualized texts to numbers linked to specific accounts. The U. S. District Court for the Northern District of California agreed and dismissed Duguid's amended complaint with prejudice. 2017 WL 635117, *4-*5 (Feb. 16, 2017).
The United States Court of Appeals for the Ninth Circuit reversed. As relevant here, the Ninth Circuit held that Duguid had stated a claim under the TCPA by alleging that Facebook's notification system automatically dialed stored numbers. An autodialer, the Court of Appeals held, need not be able to use a random or sequential generator to store numbers; it need only have the capacity to "`store numbers to be called'" and "`to dial such numbers automatically.'" 926 F.3d 1146, 1151 (2019) (quoting Marks v. Crunch San Diego, LLC, 904 F.3d 1041, 1053 (C.A.9 2018)).
We granted certiorari to resolve a conflict among the Courts of Appeals regarding whether an autodialer must have the capacity to generate random or sequential phone numbers.
Section 227(a)(1) defines an autodialer as:
Facebook argues the clause "using a random or sequential number generator" modifies both verbs that precede it ("store" and "produce"), while Duguid contends it modifies only the closest one ("produce"). We conclude that the clause modifies both, specifying how the equipment must either "store" or "produce" telephone numbers. Because Facebook's notification system neither stores nor produces numbers "using a random or sequential number generator," it is not an autodialer.
We begin with the text. Congress defined an autodialer in terms of what it must do ("store or produce telephone numbers to be called") and how it must do it ("using a random or sequential number generator"). The definition uses a familiar structure: a list of verbs followed by a modifying clause. Under conventional rules of grammar, "[w]hen there is a straightforward, parallel construction that involves all nouns or verbs in a series," a modifier at the end of the list "normally applies to the entire series." A. Scalia & B. Garner, Reading Law: The Interpretation of Legal Texts 147 (2012) (Scalia & Garner) (quotation modified). The Court often applies this interpretative rule, usually referred to as the "series-qualifier canon." See Paroline v. United States, 572 U.S. 434, 447, 134 S.Ct. 1710, 188 L.Ed.2d 714 (2014) (citing Porto Rico Railway, Light & Power Co. v. Mor, 253 U.S. 345, 348, 40 S.Ct. 516, 64 L.Ed. 944 (1920)); see also United States v. Bass, 404 U.S. 336, 339-340, 92 S.Ct. 515, 30 L.Ed.2d 488 (1971). This canon generally reflects the most natural reading of a sentence. Imagine if a teacher announced that "students must not complete or check any homework to be turned in for a grade, using online homework-help websites." It would be strange to read that rule as prohibiting students from completing homework altogether, with or without online support.
Here, the series-qualifier canon recommends qualifying both antecedent verbs, "store" and "produce," with the phrase "using a random or sequential number generator." That recommendation produces the most natural construction, as confirmed by other aspects of § 227(a)(1)(A)'s text.
To begin, the modifier at issue immediately follows a concise, integrated clause: "store or produce telephone numbers to be called." See Cyan, Inc. v. Beaver County Employees Retirement Fund, 583 U. S. ___, ___ - ___, 138 S.Ct. 1061, 1076-77, 200 L.Ed.2d 332 (2018). The clause "hangs together as a unified whole," id., at ___, 138 S.Ct., at 1077, using the word "or" to connect two verbs that share a common direct object, "telephone numbers to be called." It would be odd to apply the modifier ("using a random or sequential number generator") to only a portion of this cohesive preceding clause.
Contrary to Duguid's view, this interpretation does not conflict with the so-called "rule of the last antecedent." Under that rule, "a limiting clause or phrase ... should ordinarily be read as modifying only the noun or phrase that it immediately follows." Barnhart v. Thomas, 540 U.S. 20, 26, 124 S.Ct. 376, 157 L.Ed.2d 333 (2003); see also Lockhart v. United States, 577 U.S. 347, 351, 136 S.Ct. 958, 194 L.Ed.2d 48 (2016). The rule of the last antecedent is context dependent. This Court has declined to apply the rule where, like here, the modifying clause appears after an integrated list. See Jama v. Immigration and Customs Enforcement, 543 U.S. 335, 344, n. 4, 125 S.Ct. 694, 160 L.Ed.2d 708 (2005) (collecting cases). Moreover, even if the rule of the last antecedent were relevant here, it would provide no help to Duguid. The last antecedent before "using a random or sequential number generator" is not "produce," as Duguid needs it to be, but rather "telephone numbers to be called." There is "no grammatical basis," Cyan, 583 U. S., at ___, 138 S.Ct., at 1077, for arbitrarily stretching the modifier back to include "produce," but not so far back as to include "store."
In sum, Congress' definition of an autodialer requires that in all cases, whether storing or producing numbers to be called, the equipment in question must use a random or sequential number generator. This definition excludes equipment like Facebook's login notification system, which does not use such technology.
The statutory context confirms that the autodialer definition excludes equipment that does not "us[e] a random or sequential number generator." 47 U.S.C. § 227(a)(1)(A). Consider the TCPA's restrictions on the use of autodialers. As previously noted, § 227(b)(1) makes it unlawful to use an autodialer to call certain "emergency telephone line[s]" and lines "for which the called party is charged for the call." § 227(b)(1)(A). It also makes it unlawful to use an autodialer "in such a way that two or more telephone lines of a multiline business are engaged simultaneously." § 227(b)(1)(D). These prohibitions target a unique type of telemarketing equipment that risks dialing emergency lines randomly or tying up all the sequentially numbered lines at a single entity.
Expanding the definition of an autodialer to encompass any equipment that merely stores and dials telephone numbers would take a chainsaw to these nuanced problems when Congress meant to use a scalpel. Duguid's interpretation of an autodialer would capture virtually all modern cell phones, which have the capacity to "store ... telephone numbers to be called" and "dial such numbers." § 227(a)(1). The TCPA's liability provisions, then, could affect ordinary cell phone owners in the course of commonplace usage, such as speed dialing or sending automated text message responses. See § 227(b)(3) (authorizing a $500 fine per violation, increased to $1,500 if the sender acted "willfully" or "knowingly").
Duguid's counterarguments cannot overcome the clear commands of § 227(a)(1)(A)'s text and the statutory context. The crux of Duguid's argument is that the autodialer definition calls for a construction that accords with the "sense" of the text. Brief for Respondents 11, and n. 3. It makes the most "sense," Duguid insists, to apply the phrase "using a random or sequential number generator" to modify only "produce," which, unlike the verb "store," is closely connected to the noun "generator." Dictionary definitions of "generator," for instance, regularly include the word "produce," which carries a very different meaning than "store." Duguid also claims that, at the time of the TCPA's enactment, the technical meaning of a "random number generator" invoked ways of producing numbers, not means of storing them.
Perhaps Duguid's interpretive approach would have some appeal if applying the traditional tools of interpretation led to a "linguistically impossible" or contextually implausible outcome. Encino Motorcars, LLC v. Navarro, 584 U. S. ___, ___, 138 S.Ct. 1134, 1141, 200 L.Ed.2d 433 (2018); see also Advocate Health Care Network v. Stapleton, 581 U. S. ___, ___, 137 S.Ct. 1652, 1661, 198 L.Ed.2d 96 (2017) (noting that a "sense of inconceivability" might "urg[e] readers to discard usual rules of interpreting text"). Duguid makes a valiant effort to prove as much, but ultimately comes up short. It is true that, as a matter
Duguid's reliance on the distributive canon fails for similar reasons. That canon provides that "[w]here a sentence contains several antecedents and several consequents," courts should "read them distributively and apply the words to the subjects which, by context, they seem most properly to relate." 2A Singer, Sutherland Statutes and Statutory Construction § 47:26, at 448. Set aside for a moment that the canon's relevance is highly questionable given there are two antecedents (store and produce) but only one consequent modifier (using a random or sequential number generator). See Encino Motorcars, 584 U. S., at ___, 138 S.Ct., at 1141 ("[T]he distributive canon has the most force when the statute allows for one-to-one matching"). As just explained, the consequent "using a random or sequential number generator" properly relates to both antecedents.
Duguid next turns to legislative purpose, but he merely gestures at Congress' "broad privacy-protection goals." Brief for Respondents 28 (emphasizing that Congress prohibited calls made using an autodialer without "`prior express consent of the called party'" (quoting 47 U.S.C. § 227(b)(1)(A))). That Congress was broadly concerned about intrusive telemarketing practices, however, does not mean it adopted a broad autodialer definition. Congress expressly found that the use of random or sequential number generator technology caused unique problems for business, emergency, and cellular lines. See supra, at 1167-1168. Unsurprisingly, then, the autodialer definition Congress employed includes only devices that use such technology, and the autodialer prohibitions target calls made to such lines. See § 227(b)(1)(A).
Duguid last warns that accepting Facebook's interpretation will "unleash" a "torrent of robocalls." Brief for Respondents 38 (quotation modified). As Duguid sees it, the thrust of congressional action since the
To begin with, Duguid greatly overstates the effects of accepting Facebook's interpretation. The statute separately prohibits calls using "an artificial or prerecorded voice" to various types of phone lines, including home phones and cell phones, unless an exception applies. See 47 U.S.C. §§ 227(b)(1)(A) and (B). Our decision does not affect that prohibition. In any event, Duguid's quarrel is with Congress, which did not define an autodialer as malleably as he would have liked. "Senescent" as a number generator (and perhaps the TCPA itself) may be, that is no justification for eschewing the best reading of § 227(a)(1)(A). This Court must interpret what Congress wrote, which is that "using a random or sequential number generator" modifies both "store" and "produce."
* * *
We hold that a necessary feature of an autodialer under § 227(a)(1)(A) is the capacity to use a random or sequential number generator to either store or produce phone numbers to be called. The judgment of the Court of Appeals is reversed, and the case is remanded for further proceedings consistent with this opinion.
It is so ordered.
Justice ALITO, concurring in the judgment.
I agree with the Court that an "automatic telephone dialing system," as defined in the Telephone Consumer Protection Act of 1991, must have the capacity to "store ... telephone numbers" by "using a random or sequential number generator." 47 U.S.C. § 227(a)(1)(A). I also agree with much of the Court's analysis and the analysis in several Court of Appeals decisions on this question. See Gadelhak v. AT&T Servs., Inc., 950 F.3d 458, 463-468 (C.A.7 2020); Glasser v. Hilton Grand Vacations Co., 948 F.3d 1301, 1306-1312 (C.A.11 2020).
I write separately to address the Court's heavy reliance on one of the canons of interpretation that have come to play a prominent role in our statutory interpretation cases. Cataloged in a treatise written by our former colleague Antonin Scalia and Bryan A. Garner, counsel for respondents in this case, these canons are useful tools, but it is important to keep their limitations in mind. This may be especially true with respect to the particular canon at issue here, the "series-qualifier" canon.
According to the majority's recitation of this canon, "`[w]hen there is a straightforward, parallel construction that involves all nouns or verbs in a series,' a modifier at the end of the list `normally applies to the entire series.'" Ante, at 1169 (quoting A. Scalia & B. Garner, Reading Law: The Interpretation of Legal Texts 147 (2012) (Reading Law)).
The Court refers to this canon as a "rul[e] of grammar." Ante, at 1169. Yet the
The italicized sentence—an English translation of a sentence in the New Testament, Matthew 26:75—is not only grammatical; it is perfectly clear. No one familiar with the English language would fail to understand it—even though its meaning is contrary to the one suggested by the series-qualifier canon.
The Court writes that the series-qualifier canon "generally reflects the most natural reading of a sentence," ante, at 1169, and maybe that is so. But cf. Lockhart v. United States, 577 U.S. 347, 351, 136 S.Ct. 958, 194 L.Ed.2d 48 (2016) (relying on "the basic intuition that when a modifier appears at the end of a list, it is easier to apply that modifier only to the item directly before it"). But it is very easy to think of sentences that clearly go against the canon:
In support of its treatment of the series-qualifier canon, the Court offers this example of a sentence in which the natural reading corresponds with the interpretation suggested by the canon: "[S]tudents must not complete or check any homework to be turned in for a grade, using online homework-help websites." Ante, at 1169. I certainly agree that the adverbial phrase in this sentence ("using online homework-help websites") modifies both of the verbs it follows ("complete" and "check") and not just the latter. But that understanding has little to do with syntax and everything to do with our common understanding that teachers do not want to prohibit students from doing homework. We can see this point clearly if we retain the same syntax but replace the verb "complete" with any number of other verbs that describe something a teacher is not likely to want students to do, say, "ignore," "overlook," "discard," "lose," "neglect," "forget," "destroy," "throw away," or "incinerate" their homework. The concept of "using online homework-help websites" to do any of those things would be nonsensical, and no reader would interpret the sentence to have that meaning—even though that is what the series-qualifier canon suggests.
The strength and validity of an interpretive canon is an empirical question, and perhaps someday it will be possible to evaluate these canons by conducting what is called a corpus linguistics analysis, that is, an analysis of how particular combinations of words are used in a vast database of English prose. See generally Lee & Mouritsen, Judging Ordinary Meaning, 127 Yale L. J. 788 (2018). If the series-qualifier canon were analyzed in this way, I suspect we would find that series qualifiers
That is just my guess. Empirical evidence might prove me wrong, but that is not what matters. The important point is that interpretive canons attempt to identify the way in which "a reasonable reader, fully competent in the language, would have understood the text at the time it was issued." Id., at 33. To the extent that interpretive canons accurately describe how the English language is generally used, they are useful tools. But they are not inflexible rules.
Appellate judges spend virtually every working hour speaking, listening to, reading, or writing English prose. Statutes are written in English prose, and interpretation is not a technical exercise to be carried out by mechanically applying a set of arcane rules. Canons of interpretation can help in figuring out the meaning of troublesome statutory language, but if they are treated like rigid rules, they can lead us astray. When this Court describes canons as rules or quotes canons while omitting their caveats and limitations, we only encourage the lower courts to relegate statutory interpretation to a series of if-then computations. No reasonable reader interprets texts that way.
For these reasons, I respectfully concur in the judgment.
Some scholars have claimed that "nobody proposed [the series-qualifier] canon until Justice Scalia pioneered it" in Reading Law. Baude & Sachs, The Law of Interpretation, 130 Harv. L. Rev. 1079, 1125 (2017) (internal quotation marks omitted; emphasis deleted).