STIR/SHAKEN Verification Tool

Check Stir Shaken attestation levels and avoid being wrongly labeled as “spam”. Maximize call answer rates, protect your brand reputation, and successfully execute outbound calling campaigns.

Are you Stir Shaken Compliant?

The Federal Communications Commission (FCC) requires voice service providers to implement STIR SHAKEN framework to impose call authentication technology on Voice over Internet Protocol (VoIP) calls and business communications in North America.

By Being Stir Shaken compliant you can protect your phone numbers from call blocking, spoofing, and spam tagging and deliver an accurate and consistent call display to increase contact rates and engagement while protecting brand reputation.

Easily Verify That Your DIDs Meet STIR/SHAKEN Requirements

As more carriers start to roll out STIR SHAKEN authentication, phone numbers and call sources will be meticulously verified for attestation levels. Our BYOC STIR/SHAKEN Verification tool can help you identify your attestation levels and assist you to build trust and confidence in your voice calls.

Ishay Korn
VP IT Services

STIR is an acronym for the Secure Telephone Identity Revisited (STIR). SHAKEN is an acronym for Signature-based Handling of Asserted Information Using Tokens (SHAKEN).

Customer retention improves with STIR/SHAKEN confidence. The FCC STIR/SHAKEN mandate creates the USA standards that enable both CPaaS, UCaaS, and CCaaS providers & end-users to verify that a call is really from the number shown on the Caller ID. The goal is to reduce robocalls from spoofed numbers.

Fast. Easy. Complete.

BYOC STIR/SHAKEN Verification Tool is the only easy-to-use tool that allows you to quickly check Stir Shaken authentication of multiple numbers and obtain in-depth analysis of your certificate levels! It all adds up to improving customer engagement & end-user call experience.

The STIR/SHAKEN verification tool is very versatile; it can be used by end- enterprises/companies and UCaaS/CPaaS/CCaaS providers alike!

This tool enables you to:

  • Check STIR/SHAKEN on bulk DIDs
  • Troubleshoot any issues
  • Get recommendations on fixes
  • Verify that the fixes worked


Americans receive spam every day


robocalls happen per second

1 in 5

Americans lose money annually


billion amount consumers lost to phone scams

Why Use The IDT STIR SHAKEN Verification Tool?

This tool ensures:

  • Your voice calls have high answer rates
  • Your carrier is not rejecting your calls due to low certification levels
  • Calls are not branded as scam/untrustworthy

All of these can harm the performance of your app as well as customer retention efforts. Start cleaning up your DIDs.


What are Attestation Levels?

In a STIR-SHAKEN call, the originating service provider attests via data in the SIP header to their relationship with the caller and the caller’s right to use the calling number.  One part of the data is the Attestation level.  There are three levels of attestation that can be applied to a call:

“A” Attestation — Full

The voice service provider knows the end-user customer and their right to use the phone number.

“B” Attestation — Partial

The voice service provider knows the end-user customer but not the source of the phone number.

“C” Attestation — Gateway

The service provider has originated the call onto the network but cannot authenticate the call source e.g., international gateway.

Once a call has been given an Attestation level, that level may not be changed by another carrier.