🔍 TL;DR
A‑Level Attestation verifies caller authorization, but spam labels come from separate reputation analytics and are not guaranteed to be removed.
📊 Key Facts About Branded Calling
- A‑Level Attestation is one data point used at call termination.
- It confirms authorization to use a phone number, not call desirability.
- Call reputation analytics operate outside the STIR/SHAKEN framework.
- Spam and scam labels originate from analytics, not attestation alone.
- High call volume or complaint history can trigger labeling.
- STIR/SHAKEN and analytics are not currently integrated.
- Verified calls can still be marked as spam.
No. A‑Level Attestation does not guarantee that your calls will not be marked as spam. While it represents the highest level of confidence under STIR/SHAKEN that a caller is authorized to use a phone number, it is only one signal considered by terminating carriers.
How Attestation is Used
A‑Level Attestation is applied by the originating service provider within the SIP network when a call is signed. That attestation travels with the call to the terminating carrier and device as part of the STIR/SHAKEN framework.
It signals that the provider knows the caller and has verified the caller’s right to use the phone number. This improves accountability and traceability, but it does not evaluate call behavior, intent, or whether recipients want the call.
Why Spam Labels Still Appear
Separate from STIR/SHAKEN, wireless carriers rely on call reputation analytics to decide how calls are displayed on mobile devices. These analytics systems evaluate phone number behavior outside the authentication framework.
Factors such as call volume, call duration, complaint history, retry patterns, and historical labeling activity heavily influence whether a call is labeled as Spam or Scam. Because STIR/SHAKEN attestation and call reputation analytics operate independently and are not currently integrated, even calls with A‑Level Attestation may still receive spam labels.
Why This Matters to Enterprises
Many enterprises assume that achieving A‑Level Attestation will resolve deliverability and labeling issues. In practice, relying on attestation alone often leads to poor answer rates and continued spam tagging.
Attestation confirms that a caller is authorized. Reputation analytics determine how that call is ultimately presented to the recipient. To protect call performance, enterprises must manage reputation, dialing behavior, and complaint risk alongside authentication.
Our platform empowers organizations to manage branded calling, improve caller id reputation, and stay compliant with evolving regulatory and industry standards. FAQs like this are designed to provide clear, actionable guidance backed by our expertise in verified identity, call labeling mitigation, and spam prevention.
To explore how Numeracle supports trusted and effective outbound communications, visit www.numeracle.com.
