Regulations & Standards

How STIR/SHAKEN Works and What it Means for Your Business

Voice carriers in the U.S. are required to implement STIR/SHAKEN. This framework helps detect and stop spoofed calls before they reach consumers, or display a warning notification on the caller ID.

Digital certificates are used to authenticate phone calls, similar to how Web transactions are validated. With STIR/SHAKEN in place, spoofed calls can be detected and stopped before they reach consumers, or a warning displayed on caller ID.

Graphic depicting how STIR/Shaken works


  • When a spoofer places a call, the originating carrier can’t verify that the entity is authorized to use that number, so no authentication token is attached.
  • Without a token, the call fails verification at the terminating carrier.
  • A warning is displayed on caller ID, or the call is blocked.

Anti-robocall measures like STIR/SHAKEN have hit enterprises especially hard with expanded call blocking and spam tagging mistakenly impacting legitimate business calls. As STIR/SHAKEN is rolled out across carriers, business callers could be flagged as having low-attestation levels on customer devices. These calls will automatically receive low grades even though there are real‒ likely trustworthy‒callers on the other end.

Hear What Jimmy Garvert Says about Trusted Calls in the Telecom Reseller Podcast

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The TRACED Act mandated that all voice service providers implement STIR/SHAKEN as the caller ID authentication framework in the Internet Protocol (IP) portion of their networks by June 30, 2021.

  • STIR: Secure Telephony Identity Revisited
  • SHAKEN Secure Handling of Asserted Information using toKENs

What Can You Do?

Follow our seven-step approach to ensure your calls are not flagged incorrectly! Get Started.