Swedish telecom giant Sinch AB has quietly become America's biggest robocall pipeline

Sinch AB, a Swedish telecom company, has emerged as the single largest enabler of scam and robocalls across the Western Hemisphere. The company operates through its US subsidiary Inteliquent—acquired in late 2021 for $1.14 billion—along with Inteliquent's own subsidiaries Onvoy and Neutral Tandem.

Inteliquent doesn't operate like a normal cell carrier. Instead, it controls one of the biggest "backbones" of US phone traffic, selling wholesale voice connectivity and distributing blocks of phone numbers in bulk to other carriers and VoIP providers. Its customers span major wireless carriers, cable operators, and VoIP apps like Talkatone and TextNow. That means almost every US phone call touches its network—and so does almost every scam call.

Regulators have been chasing Sinch for years. The FTC warned Inteliquent in May 2022 that traceback notices showed the company was "apparently routing and transmitting illegal robocall traffic knowingly." The Social Security Administration's Office of Inspector General investigated Inteliquent under "Operation Upstream Carrier Without a Paddle" in 2023, resulting in a settlement and a small penalty. In May 2023, Australian regulators found Sinch's Australian subsidiary letting SMS messages out with unverified sender IDs.

But the most damning evidence came in December 2025. The Anti-Robocall Multistate Task Force—led by state attorneys general from Indiana, North Carolina, and Ohio—sent Inteliquent an eight-page notice revealing the scale of the problem. Since 2019, the company had received 9,712 traceback notices, with 5,728 arriving after August 2022, when regulators first flagged concerns.

The numbers are staggering. State AGs sampled roughly 1 billion Amazon and Apple imposter robocalls between October 2021 and November 2024. About 450 million—45 percent—ran through Inteliquent. For Social Security and IRS imposter robocalls, the agency sampled 3.1 billion calls between May 2020 and November 2024. Inteliquent facilitated approximately 1.425 billion of them.

A 2022 class action lawsuit alleged that 60 percent of all US robocalls are delivered via the Onvoy network. The case was quietly dismissed, likely through an out-of-court settlement.

A Grizzly Research report published on April 16, 2026 laid out the full picture. Despite mounting regulatory pressure and a mountain of evidence, Sinch has maintained operations largely unchanged, continuing to process what investigators estimate are hundreds of millions of scam calls annually.

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