How to block auto dialers?

The Auto Dialer Problem: Robocalls Hit a Six-Year High

Robocall volume has surged to alarming levels, with Americans receiving 2.56 billion robocalls per month in 2025—a 20% increase from the previous year. Scam calls have risen even more sharply, jumping 130% year-over-year, leaving nearly one in three adults getting at least one fraudulent call daily. These calls aren’t just annoying; they’re costly, with victims losing an average of $3,690 per scam.

Despite regulatory efforts, auto dialers remain rampant because scammers evolve faster than blocking technologies can adapt. Only 44% of phone companies have fully implemented the FCC-mandated robocall-fighting software, down from 47% in 2024, while non-compliant providers have grown to over 2,900 nationwide. This gap allows spoofed and international calls to bypass core protections like STIR/SHAKEN, which struggles to authenticate calls from legacy networks or foreign origins.

GrowthPros helps clients navigate this risky environment by ensuring all outbound lead generation complies with TCPA rules—every lead includes a verified consent record, lists are DNC-scrubbed before contact, and opt-outs are honored immediately across voice, SMS, and email. While the company doesn’t offer inbound call blocking tools, its compliance-first approach reduces legal risk and supports ethical outreach in an increasingly regulated space.

To protect themselves, consumers should use a layered defense: enable carrier-level blocking, install trusted call-labeling apps, and leverage built-in phone features to flag or silence suspicious numbers. Reporting unwanted calls to the FTC via DoNotCall.gov also strengthens community-wide blocking systems by feeding real-time data into scam detection networks. As robocall tactics grow more sophisticated, combining technology, regulation, and vigilance remains the most effective strategy.

Why Blocking Is Harder Than It Should Be

If you're wondering why your phone still rings off the hook despite a decade of regulation and billions invested in call-blocking technology, you're not imagining it. Robocall volume hit a six-year high in 2025, with 2.56 billion robocalls per month — a 20% jump from 2024.

The core problem is that the industry's main defense, STIR/SHAKEN caller ID authentication, has structural blind spots. Academic researchers note that these mechanisms have, frankly, "not been effective," because STIR/SHAKEN cannot completely authenticate calls originating outside the country or calls transiting legacy phone circuits. Auto dialers exploit precisely these gaps.

Carrier compliance is also moving in the wrong direction. As of September 2025, only 44% of phone companies have fully installed the mandated robocall-fighting software — down from 47% in 2024 — while non-compliant providers rose to 2,909, up from 2,567. The FCC responded forcefully, disconnecting 1,388 non-compliant phone companies from the U.S. network in August 2025, but enforcement alone hasn't closed the gap.

The data tells a troubling story about how quickly scammers adapt:

• Scam robocalls are up 130% in September 2025 versus September 2024, even as overall robocall volume fell 9.6% year-over-year, per the YouMail Robocall Index.
• About 57% of robocalls in 2025 are scam or telemarketing calls.
• Money lost to phone-initiated scams rose 16% from H1 2024 to H1 2025, according to the FTC.

On the legal side, the rules are tightening. In February 2024, the FCC confirmed that AI-generated voices count as "artificial" under the TCPA, making AI-driven robocalls unlawful without prior express written consent. For legitimate businesses, this raises the stakes on consent documentation — which is why GrowthPros attaches a full consent record to every lead it delivers, rather than assuming consent exists.

The takeaway is simple: no single tool — not the Do Not Call Registry, not carrier blocking, not STIR/SHAKEN — stops auto dialers on its own. As the FTC puts it, your best defense is call blocking and call labeling layered together. The rest of this guide walks through how to build that stack.

The Multi-Layered Blocking Strategy That Actually Works

Robocall volume reached 2.56 billion per month in 2025, a 5, a 20% increase from the previous year, with scam calls surging 130% year-over-year despite slight declines in overall volume. This evolving threat landscape makes it clear that no single solution can fully stop auto dialers, especially as spoofing techniques and international robocalls bypass basic defenses. The FTC emphasizes that combining multiple layers of protection is essential for meaningful defense against unwanted calls.

A multi-layered strategy works best when it integrates call blocking apps, carrier-level services, built-in phone features, and call labeling systems that flag suspicious numbers as "spam likely." Blocking apps leverage aggregated user reports and FTC data to identify known bad actors, while carrier-level services use STIR/SHAKEN technology to authenticate calls before they reach your device. Built-in phone features on iOS and Android allow manual blocking and silencing of unknown callers, adding another barrier. Call labeling doesn’t block calls outright but empowers users to make informed decisions about answering, which is critical since STIR/SHAKEN cannot fully authenticate calls originating outside the U.S. or transiting legacy networks.

Reporting unwanted calls strengthens this defense for everyone. By filing complaints at DoNotCall.gov or ReportFraud.ftc.gov, consumers help improve blocking algorithms and support FTC enforcement actions—like the disconnection of 1,388 non-compliant phone companies in August 2025. GrowthPros supports this ecosystem by ensuring all outbound leads are DNC-scrubbed, consent-recorded, and TCPA-compliant, reducing the chance their contacts contribute to the robocall problem. Together, these layers create a feedback loop that enhances protection across the network.

For Businesses: Don't Be the Auto Dialer — Stay TCPA-Compliant

For businesses making outbound calls, compliance isn't just about avoiding fines—it's about not becoming the very auto dialer your customers are trying to block. The TCPA requires prior express written consent for any prerecorded or AI-generated voice calls, immediate and permanent honoring of opt-outs, and restricting calls to the 8:00 a.m. to 9:00 p.m. window in the recipient's time zone. Violations can trigger penalties of up to $1,500 per call, a risk amplified by the fact that scam robocalls surged 130% year-over-year in September 2025, eroding consumer trust in all unsolicited calls.

To stay compliant and maintain answer rates, businesses must scrub every list against the National Do Not Call Registry before dialing and maintain detailed consent records for each contact. This includes capturing the disclosure text presented, timestamp, IP address, and the specific entity placing the call—elements that form an auditable trail proving prior express written consent. GrowthPros builds this compliance directly into its lead delivery process: every lead includes a verified consent record and is sourced only from DNC-scrubbed, opted-in data, ensuring outbound efforts align with TCPA requirements from the first dial.

• Consent records include disclosure text, timestamp, IP address, and named contacting party for full TCPA alignment
• All leads are DNC-scrubbed before delivery, preventing calls to numbers on the National Do Not Call Registry
• Opt-outs are honored immediately and permanently across voice, SMS, and email channels
• FCC one-to-one consent standards are embedded in lead qualification and delivery workflows
• Reactivation campaigns target only pre-existing, opted-in relationships—never cold lists

By treating compliance as a core feature rather than an afterthought, businesses can reach buyers without triggering call-blocking apps or carrier-level filters designed to stop abusive auto dialers. This approach protects brand reputation, reduces legal exposure, and improves connection rates—turning regulatory adherence into a competitive advantage in an environment where 57% of robocalls are now classified as scam or telemarketing. When every call is consent-based, transparent, and respectful of consumer preferences, the phone remains a trusted channel—not another source of unwanted noise.

Your Action Plan: Block, Label, Report, and Buy Clean Leads

Your Action Plan: Block, Label, Report, and Buy Clean Leads

Taking control of your phone starts with a layered defense. Robocall volume hit a six-year high in 2025 at 2.56 billion calls per month—a 20% increase from 2024—making proactive steps essential. Carrier compliance is declining too, with only 44% of phone companies having fully installed mandated robocall-fighting software as of September 2025, down from 47% the year before.

Start by enabling carrier-level blocking and labeling services, which use STIR/SHAKEN to authenticate calls and flag suspicious numbers before they reach you. Pair this with a trusted call-blocking app that aggregates user reports and FTC data to improve accuracy, as no single method stops all unwanted calls. Built-in phone features like silence unknown callers add another layer, especially for landlines or older devices.

Next, register your number at DoNotCall.gov and report every illegal robocall you receive. Reporting helps the FTC track scam patterns and improves blocking algorithms for everyone—though the FTC notes the registry won’t stop scammers, it remains a critical tool for enforcement and feedback.

For businesses, audit your outbound practices against TCPA rules: restrict calls to 8:00 a.m.–9:00 p.m., obtain prior express written consent for artificial voices, and honor opt-outs immediately and permanently across all channels. GrowthPros builds these safeguards into every lead, scrubbing lists against the DNC and attaching a full consent record—disclosure text, timestamp, IP, and contacting party—to reduce legal risk and improve answer rates.

When leads are contacted within five minutes, contact likelihood increases roughly 100x compared to thirty minutes, and 78% of buyers choose whoever responds first. That’s why every GrowthPros lead triggers AI voice, SMS, and email follow-up inside that window—turning compliance into a competitive advantage.

Ready to see how clean, consent-recorded leads change your outreach? Book a 15-minute qualification call to review your niche, goals, and current lead sources—no pressure, just a clear fit assessment.