Understanding STIR/SHAKEN


STIR/SHAKEN is a framework and set of protocols introduced by the FCC and adopted by US carriers on June 30th, 2021. It's an industry-wide initiative to combat fraudsters by reducing the effectiveness of robocalls and phone number spoofing to restore trust in voice communication.

By registering for STIR/SHAKEN, carriers can validate the origin of your call which impacts wither your calls are displayed as "Caller Verified" or "Spam Likely". A call with the highest attestation level is less likely to be filtered by carriers and in conjunction with a Branded Caller ID, be seen as more trustworthy to your contacts.

How does STIR/SHAKEN work?

When STIR/SHAKEN is enabled, carriers will verify the digital certificate associated with a calling number to ensure that the originating device has not spoofed the number. This prevents fraudsters from using your numbers and harming your reputation while protecting the deliverability of legitimate calls placed by your business.

What are attestation levels?

The FCC designates the following levels of attestation for a voice call:

  • A Level Attestation: A service provider authenticated the caller's device and the caller is authorized to use the calling number.
  • B Level Attestation: A service provider authenticate the call's origin, but can't verify the caller is authorized to use the number.
  • C Level Attestation: it doesn't meet the requirements of A or B including international calls.


A call made from ringDNA using a phone number sourced from us will have "A" Attestation, the highest possible attestation level.

A call made from ringDNA using an Outbound Number set to an external number not sourced from Revenue.io will have B level attestation.

How do I register my business?

You would have likely already been registered during your initial implementation of ringDNA. If you are receiving reports of your numbers being displayed as spam, please refer to this article for troubleshooting and contact our Support team for more assistance.

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