🔍 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
How Attestation Is Used
A‑Level Attestation does not guarantee that your calls will not be marked as spam.
A‑Level Attestation is applied by the originating service provider within the SIP network and travels with the call to the terminating device as part of the STIR/SHAKEN framework. While it signals a high level of confidence that the caller is authorized to use the phone number, it is only one of many data points considered by terminating providers when determining how a call is displayed.
Why Spam Labels Still Appear
Separate from STIR/SHAKEN, wireless carriers rely on call reputation analytics to evaluate phone number behavior outside the authentication framework. These analytics assess factors such as call volume, call duration, complaint history, and past labeling activity, and they are the primary source of “Spam” or “Scam” indicators shown on mobile devices. Because STIR/SHAKEN attestation and call reputation analytics operate independently and are not currently integrated, even calls with A‑Level Attestation may still be labeled as spam.
Why This Matters to Enterprises
Relying on attestation alone leads to poor answer rates. Attestation confirms caller authorization, while analytics determine how the call is ultimately presented to the recipient so managing reputation is required 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.
