The STIR/SHAKEN attestation page (https://signalwire.com/docs/platform/voice/stir-shaken#attestation-levels)
states:
"By default, all outbound calls from phone numbers bought on the SignalWire
platform receive attestation level C. Levels A and B attestation require a
vetting process. For more information regarding attestation and our vetting
process, please create a support ticket with us."
This doesn't explain what differentiates an A outcome from a B outcome once
vetting is complete. It could add something like the following for attestation once vetting is complete:
"A (Full): the provider has verified both the caller's identity and that they are authorized to use the specific calling number. Using a SignalWire purchased number accomplishes this.
B (Partial): the provider has verified the caller's identity, but not that they're authorized to use that specific calling number. If a Verified caller ID number is used, providers provide a B level."
This information was verified with AI and also earlier with Michael in slack: https://signalwire.slack.com/archives/C035TPRCN4U/p1775857338011459
The STIR/SHAKEN attestation page (https://signalwire.com/docs/platform/voice/stir-shaken#attestation-levels)
states:
"By default, all outbound calls from phone numbers bought on the SignalWire
platform receive attestation level C. Levels A and B attestation require a
vetting process. For more information regarding attestation and our vetting
process, please create a support ticket with us."
This doesn't explain what differentiates an A outcome from a B outcome once
vetting is complete. It could add something like the following for attestation once vetting is complete:
"A (Full): the provider has verified both the caller's identity and that they are authorized to use the specific calling number. Using a SignalWire purchased number accomplishes this.
B (Partial): the provider has verified the caller's identity, but not that they're authorized to use that specific calling number. If a Verified caller ID number is used, providers provide a B level."
This information was verified with AI and also earlier with Michael in slack: https://signalwire.slack.com/archives/C035TPRCN4U/p1775857338011459