Your carrier signs directly
A-Level requires that whoever signs your call knows your identity and confirms you're authorized to use the number — strongest when your carrier signs directly.
I want to…
Get A-Attestation on My Calls
A-Level attestation is the strongest signal that your calls are verified and authorized. Here's what it takes to earn it on every outbound call.
Three things have to line up
Verified number ownership
The signing provider must be able to confirm you're the legitimate, authorized user of the calling number.
Direct carrier termination
Calls that route straight to AT&T, Verizon, and T-Mobile arrive without a token downgrade on the handoff.
The usual culprits
Aggregators in the path
Routing through a reseller or aggregator often strips or downgrades the attestation token before it reaches the carrier.
Unverified numbers
Numbers the signing provider can't verify you're authorized to use will get a lower attestation level by default.
Reseller hand-offs
Every hand-off between your dialer, a reseller, and the destination carrier is another place attestation can degrade.
Direct delivery
Signed once, delivered directly
Calls leave QVD signed with full A-Level STIR/SHAKEN attestation and route directly to the carriers that matter — no aggregator in the middle, no token downgrade, no third-party finger-pointing when something goes wrong.
- Straight to AT&T, Verizon, T-Mobile
- One provider owns signing and delivery
A-Level
Highest STIR/SHAKEN attestation tier
38%
Average answer-rate lift for TCC™ clients
Billions
Of calls processed in the last year