A-Level — Full attestation
The signing provider knows your identity and confirms you're authorized to use the number. Full trust.
Reputation & Delivery
A-Attestation & STIR/SHAKEN
A-Level attestation tells carriers your calls are verified and authorized. As a SHAKEN-authorized carrier, QVD signs your calls directly so they carry the highest attestation available.
- STIR/SHAKEN authorized since 2021
- FCC Section 214 carrier
- All 4 CTIA BCID™ roles
- A-Level attestation
- Direct carrier termination
Why A-Level matters
Attestation is a major input to how carriers treat and label your calls. A-Level signals full authorization; lower levels can leave your legitimate calls looking unverified.
The three attestation levels
Not all signed calls are treated the same by carriers.
B-Level — Partial attestation
The provider knows your identity but can't confirm authorization for the number. Reduced trust.
C-Level — Gateway attestation
The provider can't verify the call's origin at all, such as international gateway traffic. Lowest trust.
We sign your calls directly
Many providers route through aggregators that strip or downgrade attestation. QVD terminates your calls itself, so the A-Level signature stays intact all the way to the destination carrier.
- Verified business identity on file with QVD
- Confirmed authorization for every number you dial from
- No aggregator hop between you and the destination carrier
- Signed and delivered by the same SHAKEN-authorized carrier
Why sign with QVD
1st wave
of authorized STIR/SHAKEN service providers in the nation
38%
average answer rate lift for TCC™ clients
130+
years of combined telecom and call-center expertise
STIR/SHAKEN attestation: common questions
What does A-Level STIR/SHAKEN attestation mean?
It's the highest of the three STIR/SHAKEN attestation levels. It tells the receiving carrier that the signing provider knows your identity and has confirmed you're authorized to use the number you're calling from.
Why would my calls only get B-Level or C-Level attestation?
This usually happens when the provider signing your calls can't fully verify your identity or your right to use the number — often because you're routed through an aggregator or reseller instead of the carrier itself.
Can a provider downgrade my attestation without telling me?
Yes. Attestation can be silently downgraded anywhere in the call path, including at aggregator hops between your provider and the destination carrier. Testing your calls periodically is the only way to know for sure.
Does A-Level attestation guarantee my calls won't show as Spam Likely?
No. Attestation and caller ID reputation are related but separate systems. A-Level attestation supports trust, but it needs to be paired with reputation monitoring and remediation to fully protect answer rates.
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