# Buying a danish number for outbounding

**URL:** <https://community.retellai.com/t/buying-a-danish-number-for-outbounding/2862>\
**Category:** Support Help\
**Tags:** telephony\
**Created:** [May 26, 2026, 9:07am UTC](https://community.retellai.com/t/buying-a-danish-number-for-outbounding/2862 "2026-05-26T09:07:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![undervisning](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/undervisning/32/1994_2.png) [@undervisning](https://community.retellai.com/u/undervisning)\
**Post date:** [May 26, 2026, 9:07am UTC](https://community.retellai.com/t/buying-a-danish-number-for-outbounding/2862/1 "2026-05-26T09:07:54Z")

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Hi dear community!

I need to get a danish telephone number for OUTBOUND calling!

In the documentation there is a video: [https://www.youtube.com/watch?v=JC3PV\_R-Z1Y](https://www.youtube.com/watch?v=JC3PV_R-Z1Y)

However chatgpt. states that for specific outbound usage of the number, the process is an another one. Chatgpt mentions:

For Retell outbound calling, the exact steps depend on whether the +45 number comes **from Twilio** or from a **separate Danish SIP provider**.

If you successfully get a +45 number in Twilio:

### 1. Buy the Danish number

Go to:

Twilio Phone Numbers Console

- Search for **Denmark (+45)**

- Select **Voice**

- Purchase the number

### 2. Connect Twilio to Retell

Open:

Retell AI Dashboard

Then:

- Go to **Phone Numbers / Telephony**

- Choose **Connect Twilio**

- Copy the credentials Retell requests (typically Account SID/Auth setup or guided integration)

- Authorize the connection

### 3. Assign the number as outbound caller ID

Inside Retell:

- Open your AI agent

- Go to **Outbound Calling**

- Select **Caller ID**

- Choose your new **+45 number**

- Save

Can anybody please confirm or give advice regarding usage of danish numbers!

Thanks a ton in advance!

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<div class="post-metadata">

**Author:** ![mark1](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/mark1/32/2524_2.png) [@mark1](https://community.retellai.com/u/mark1)\
**Post date:** [May 26, 2026, 12:46pm UTC](https://community.retellai.com/t/buying-a-danish-number-for-outbounding/2862/2 "2026-05-26T12:46:20Z")

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Hey @undervisning Retell only sells US and Canada numbers directly — Denmark (+45) is not available for direct purchase. To use a Danish number, you need to import one via custom telephony (e.g., Twilio Elastic SIP Trunking).

The actual process differs from what ChatGPT described — it’s SIP trunking, not a “Connect Twilio” wizard:

1. In Twilio: Create an Elastic SIP Trunk, configure Termination (outbound) — whitelist Retell’s SIP SBC CIDR `18.98.16.120/30` or set username/password auth. Configure Origination (inbound) to `sip:sip.retellai.com`. Purchase/move the +45 number into this trunk.

2. Enable international dialing in Twilio: Search “geo” → Voice Geographic Permissions → select “Elastic SIP Trunking” → enable Denmark.

3. In Retell: Import the number, supplying the Termination SIP URI (and username/password if used).

4. Assign your agent to the imported number — outbound calls will use it as caller ID automatically.

You can watch that video and follow to connect. Thank You