January 7, 2026
Why Does Call Attestation Monitoring Matter for Your Business?
Your sales team must be able to reach high-quality leads before they can convert them into customers. If people don’t answer, you’ll never close that sale.
That simple fact highlights the importance of keeping a high attestation rating for all of your outbound numbers. In some cases, even a small mistake can make it nearly impossible for your sales team to connect with leads.
Understanding Call Attestation Levels
There are three call attestation levels:
- A – Full attestation
- B – Partial attestation
- C – Gateway attestation
Full attestation means that a voice service provider (VSP) can verify a caller’s identity, that they assigned the phone number, and that the call originated on their network.
Partial attestation means that the VSP can verify the caller’s identification and that the call originated on their network. However, the VSP cannot verify that it gave the caller the phone number.
Gateway attestation means that the VSP can only verify that the call originated outside of its network. In other words, the VSP can’t vouch for the caller’s identity or phone number. This typically happens when calls originate overseas.
As a business, you only want numbers with full attestation. Anything lower than that will make it harder to connect with customers.
How Does Call Attestation Work?
Call attestation relies on digital signatures used by the STIR/SHAKEN framework. Basically, if the primary VSP can authenticate the call’s origin, the network will assign a high attestation rating. The technical details get much more complicated than that, but that is the foundation of determining call attestation levels.
Once an attestation level gets applied to a call, the network can decide how to handle it. Calls with low attestation ratings (anything lower than full attestation) often get negative call labels like “spam likely.” The network can also direct low-attestation calls to honeypot numbers, where data is collected to determine whether the caller is trying to break laws. The network can also block low-attestation calls to protect consumers.
Why Call Attestation Monitoring Matters
Since networks can block calls with low-attestation levels, you might never have an opportunity to reach some of your leads and customers. When that happens, your answer rates will decrease. You might also notice that customers are upset because they didn’t receive important calls, such as appointment reminders.
Call attestation monitoring helps you stay ahead of these potential issues and
- Increases answer rates
- Enhances brand trust
- Mitigates fraud
- Prevents negative call labels
- Protects calling reputation
- Supports compliant calling
Without call attestation monitoring, you don’t know what happens when you call someone. Once you start monitoring your levels, you gain insights into how you can improve outreach, branding, and reputation management efforts.
How Do I Check My Call Attestation Rating?
Caller ID Reputation’s STIR/SHAKEN Attestation Tester makes it easy for you to get all of the information you need to keep your numbers at full attestation.
When you sign up for the service, you can get each number’s:
- Attestation rating
- CNAM information
- Certificate data
- Verstat validation
To check your number, register it on Caller ID Reputation, use your number to call the testing tool, and get an instant report.
Schedule a live demo to see how the attestation rating tool can work for you.
How Are Attestation Ratings Determined?
Early in this article, we focused on the roles VSP verification plays in attestation ratings. That isn’t the end of the story, though. Several other factors can influence your attestation ratings.
CNAM and Rich Call Data
Register your phone numbers so the database can find your information quickly. Also, take advantage of rich call data (RCD) that enhances consumer trust and lets carriers access your information without relying on third-party databases.
Data Hygiene
Compare your lead lists with the Do Not Call (DNC) Registry and Reassign Number Database (RND) to avoid calling consumers who have opted out of communications. These steps will improve your brand reputation and help prevent blocks from third-party apps.
Good Dialing Habits
Follow all regulations established by the FCC and your industry. Also, limit the number of times you use a number to make calls each day. Too many calls can make it look like you use a robodialer, which encourages third-party apps to warn consumers that they shouldn’t answer your calls.
Which Network Partners You Use
Only partner with trusted networks with positive reputations. You might save money by signing up with a budget network, but it will cost you in the long run. The FCC has blocked entire VSPs for regulatory non-compliance. In August of 2025, a task force removed 185 non-compliant VSPs from the RMD, effectively banning them from voice networks in the United States.
How Can I Improve Call Attestation Rating?
Luckily, there are several ways you can improve your call attestation rating. They include:
- Working with trusted partners who can accurately and efficiently verify your caller ID information and origin.
- Follow ethical dialing strategies that help your numbers avoid negative call labels.
- Comply with all DNC, TCPA, local, federal, and industry compliance standards.
- Scrubs your lead and contact lists before giving them to your sales team.
Regardless of the strategies you use, you want to know your number attestation ratings. Proactively monitoring every phone number helps your company identify small issues before they turn into big problems.
Get started today by contacting Caller ID Reputation.
