### Answer --- To get a Swedish number for your voice agent, you'll need to use custom telephony via SIP trunking [(1) ]() . Retell AI doesn't directly provide Swedish numbers, but you can obtain one from a telephony provider that supports Sweden and then connect it to Retell AI . Here's the process: 1. Get a Swedish number from a SIP trunking provider - Choose a telephony provider that offers Swedish numbers and supports elastic SIP trunking (like Twilio, Telnyx, or Vonage) [(1) ]() [(2) ]() . 2. Set up SIP trunking - Configure your SIP trunk with your telephony provider. You'll need to point your number to Retell's SIP server [(1) ]() : - **Retell SIP server URI**:

sip:sip.retellai.com

- **IP block for traffic**:

18.98.16.120/30

(All regions) ,

143.223.88.0/21

(certain United States traffic) ,

161.115.160.0/19

(certain United States traffic) 3. Import the number into Retell AI - Once your SIP trunk is configured, import your Swedish number using the Import Phone Number API [(3) ]() :

javascript
import Retell from 'retell-sdk';
const client = new Retell({
 apiKey: process.env['RETELL_API_KEY'],
}) ;
const phoneNumberResponse = await client.phoneNumber.import({
 phone_number: '+46XXXXXXXXX', // Your Swedish number in E.164 format
 termination_uri: 'someuri.pstn.twilio.com', // Your SIP trunk URI
}) ;

The phone number must be in E.164 format (country code + number with no spaces or special characters) . For Sweden, this means starting with

+46

. **Note**: A Discord user mentioned having issues with a Swedish Telnyx number showing "user busy" errors [(4) ]() . Make sure to check your origination settings in your telephony provider and review their logs if you encounter connection issues [(1) ]() .

​ To learn more, see the sources I considered: [[1] Custom Telephony Overview](https://docs.retellai.com/deploy/custom-telephony) [[2] AI in SIP Calling & Telephony Solutions | Retell AI](https://www.retellai.com/blog/integrating-ai-with-sip-trunking-and-modern-telephony) [[3] Import Phone Number](https://docs.retellai.com/api-references/import-phone-number) [[4] Discord message from @mushrooooom on 2025-08-06](https://discord.com/channels/1186424376300679209/1186462578310910112/1402694311291650190) ​

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