The Outbound Voice AI Phone Number Checklist

Outbound voice AI deployments often depend on phone-number strategy, telecom setup, caller reputation, and compliance as much as agent design. Organizations can buy Retell-managed US or Canadian numbers for quick setup and built-in reputation options, or import existing numbers through elastic SIP trunks when retaining known caller IDs or current carriers is necessary; international calling availability, costs, capacity, and features vary by provider and number type. To reduce “Spam Likely” labeling, businesses are advised to establish an approved business profile, apply for verified-number and branded-calling services where available, warm up new numbers gradually, monitor carrier-related call failures, and maintain stable caller IDs and consistent branding. The checklist also covers callback routing, SIP and network requirements for bring-your-own-carrier configurations, transfer support, call concurrency, and live testing. A2P 10DLC registration is required only for US SMS capabilities, while outbound voice campaigns should also enable do-not-contact handling, honor internal suppression lists, and account for applicable consent rules before launch.

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