Get More ‘Hellos’ With STIR/SHAKEN Compliant Call Technology

Telecommunications compliance required by the FCC

Phonexa is certified for the full implementation of STIR/SHAKEN protocols that validate caller IDs and improve the caller experience for Phonexa clients and their customers.

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STIR/SHAKEN Compliance Is Critical Now More Than Ever

  • unknown call 79%

    Calls that go unanswered if the caller source is unidentified*

  • robocalls 2.7K

    Robocalls placed per second in 2021**

  • spam 18%

    Consumers who reported receiving more than three spam calls per day***

  • scum $30B

    Approximate amount Americans lost to phone scams in 2021 — up from over $10B in 2020****

  • Sources

  • *Hiya State of the Call 2022 Report


  • ***First Orion

    ****Truecaller Insights 2021 U.S. Spam & Scam Report

What STIR/SHAKEN Compliance Means for Phonexa Clients

Phonexa’s implementation of STIR/SHAKEN FCC protocols, enforced to counteract the risks associated with illegal spam robocalls contacting consumers, is an invaluable tool to clients. These industry standards are designed to certify that calls are made by real people from real businesses to prevent the spoofing of caller ID data.

What STIR/SHAKEN Compliance Means

How is Phonexa Compliant With STIR/SHAKEN?

With Call Logic, Phonexa’s call tracking and distribution product, the company helps businesses ensure that all inbound and outbound calls go through a series of authentication and verification processes through a certification repository that verifies phone numbers, ultimately protecting parties on both ends of the phone call.

Certificate Repository


Authentication Service

Verification Service


Originating Telephone Service Provider

Originating Telephone Service Provider

Terminating Telephone Service Provider

Terminating Telephone Service Provider
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Calling Party

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Called Party


Outbound Caller Verification

Outbound Caller Verification

STIR (Secure Telephone Identity Revisited) protocols confirm the legitimacy of outbound calls and the identity of callers, ultimately helping businesses to deter caller ID spoofing. Phonexa clients get the ability to retain their business reputation when making outbound calls to their clients. This is achieved by a thorough caller ID verification process that confirms and showcases the ID attached to an incoming phone call.

Outbound Caller Verification

Inbound Caller Verification

Inbound Caller Verification

SHAKEN (Signature-based Handling of Asserted Information Using toKENs) protocols verify the legitimacy of inbound calls. This warns consumers about illegitimate incoming calls by flagging spam callers with “scam likely” or similar identification, protecting them from answering calls from fraudulent sources.

Inbound Caller Verification

Building Trust With Digital Signatures

Building Trust With Digital Signatures

STIR and SHAKEN protocols work in tandem to verify the caller`s identity with a digital certificate. In this framework, secure telephony identity (STI) governance authorities issue dedicated telephone numbers to businesses. Private keys associated with each digital certificate are then used to sign a VoIP call, which essentially indicates the legitimacy of the calling party.

Phonexa supports this effort by placing a digital signature or a certificate of authenticity on calls placed, confirming that calls are coming from sources authorized to use a specific phone number. The digital signature associated with a call remains until it reaches its desired destination.

Building Trust With Digital Signatures

The 3 Levels of STIR/SHAKEN Attestation

In the STIR/SHAKEN call environment, there are three ways a call can be attested for verification. The following are the three levels of STIR/SHAKEN attestation, along with details on how Phonexa applies each level to inbound and outbound calls within its network.

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    Full Attestation

    Phonexa confirms that a caller is authorized to use the phone number they’re calling from

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    Partial Attestation

    Phonexa identifies the caller but doesn’t have confirmation that the caller is authorized to use the phone number they dialed from

  • spam
    Gateway Attestation

    The caller’s identity and authorization to use the number they called from cannot be validated

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