### Answer Based on the available documentation, the

allowed_outbound_country_list

field uses ISO 3166-1 alpha-2 country codes [(1) ]() [(2) ]() . The documentation shows examples like

["US", "CA"]

for the United States and Canada . I don't have specific information in the sources about how U.S. territories like Puerto Rico and the U.S. Virgin Islands are handled in the allowed outbound country list, or whether they require separate country codes beyond "US". For U.S. territories that may require special handling, I recommend reaching out to Retell AI support directly, as this appears to be a specific configuration question not covered in the available documentation. You could also try checking if there are specific ISO 3166-1 alpha-2 codes for these territories (such as "PR" for Puerto Rico or "VI" for U.S. Virgin Islands) that need to be added to your

allowed_outbound_country_list

alongside "US".

​ To learn more, see the sources I considered: [[1] Import Phone Number](https://docs.retellai.com/api-references/import-phone-number) [[2] Create Phone Number](https://docs.retellai.com/api-references/create-phone-number) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

### Answer Based on the error message you're seeing ("Call country not supported: PR") , it appears that Puerto Rico (PR) is being treated as a separate country code from the United States (US) in Retell AI's system [(1) ]() . The

allowed_outbound_country_list

field accepts ISO 3166-1 alpha-2 country codes [(2) ]() [(3) ]() . While the documentation shows examples like

["US", "CA"]

, it doesn't explicitly list which territories or country codes are supported for outbound calling. To configure allowed outbound countries via API, you would use [(3) ]() :

json
{
  "allowed_outbound_country_list": ["US", "CA"]
}

However, the specific error "Call country not supported: PR" suggests that even if you add "PR" to your allowed list, Puerto Rico may not be a supported destination for outbound calls through Retell AI's telephony infrastructure. This is different from simply being restricted by your allowed country list—it indicates a platform-level limitation. I recommend contacting Retell AI support directly to: 1. Confirm whether Puerto Rico and U.S. Virgin Islands are supported destinations for outbound calls 2. If supported, get the correct country codes to add to your

allowed_outbound_country_list

3. If not currently supported, inquire about potential workarounds or future support Check out these potentially useful sources: [Import Phone Number]() , [Create Phone Number]() , [Fraud Protection]()

​ To learn more, see the sources I considered: [[1] Discord message from @vas.d on 2026-01-23](https://discord.com/channels/1186424376300679209/1186462578310910112/1464248030156034247) [[2] Import Phone Number](https://docs.retellai.com/api-references/import-phone-number) [[3] Create Phone Number](https://docs.retellai.com/api-references/create-phone-number) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.