# Purchase a DID on Telnyx Platform

Before placing or receiving calls, you must have at least one active DID (phone number) on your Telnyx account.\
If you already have one or more active DIDs, you may skip this section.

### Purchase a DID on the Telnyx Platform

To purchase a DID on your Telnyx account, follow these steps:

1. Sign in to your [Telnyx account](https://portal.telnyx.com/).
2. From the left-hand navigation menu, go to **Numbers > My Numbers**.
3. Click the **Search & Buy Numbers** tab.
4. Search for available numbers, then click **Add to Cart** to purchase the DID(s).

<figure><img src="https://846155343-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MfkamWLaD5pcQwlKWwC%2Fuploads%2FojXAiNbxGaRSlP6kcg6k%2Ftelnyx-fig1.png?alt=media&#x26;token=dd908210-225a-42cf-aa7a-e098d83f3950" alt=""><figcaption></figcaption></figure>

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#### View Purchased Numbers

After checkout is complete:

1. Navigate to **Numbers > My Numbers**.
2. Click the **My Numbers** tab.
3. Your purchased DID numbers will be listed there.

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### Next Steps

Once the DID numbers are available, proceed with one of the following guides to configure the Telnyx trunk in PortSIP PBX:

* [Configuring Telnyx IP Authentication Trunk](https://support.portsip.com/portsip-communications-solution/configuring-sip-trunks/telnyx-sip-trunk/configuring-telnyx-ip-authentication-trunk)
* [Configuring Telnyx Register Authentication Trunk](https://support.portsip.com/portsip-communications-solution/configuring-sip-trunks/telnyx-sip-trunk/configuring-telnyx-register-authentication-trunk)