STIR/SHAKEN is the caller-ID authentication framework used in the United States and Canada. Originating providers sign each call with an attestation level that tells the terminating network how confident the signer is that the caller is entitled to the number displayed. Terminating networks and analytics engines use the signature, together with traffic behaviour, when deciding how to treat a call.
The signer knows the customer and knows they are entitled to use the number shown.
The signer knows the customer, but cannot confirm they are entitled to that particular number.
The signer only knows where the call entered its network, for example from an international gateway.
Unsigned or poorly attested calls into North America are more likely to be labelled as spam risk or blocked outright by carrier analytics. For any business calling North America at volume, attestation combined with clean CLI practice and reasonable attempt patterns is what keeps answer rates workable on US and Canadian corridors.
A wholesale carrier handling North American termination should be able to say how calls are signed on its routes, insist on accurate CLI, and screen the traffic profile before opening the corridor. A carrier that asks no questions about your US traffic is a carrier whose routes will not stay clean.
Callivex terminates to the US and Canada with STIR/SHAKEN attestation applied, and clear CLI presented intact to the destination network on every call. Company details and the traffic profile are reviewed before rates go out. US corridors are opened deliberately, matched to how the traffic is actually dialled.
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