# Purchase a DID on SIPTRUNK  Platform

Before you can place or receive calls, you must have at least **one active DID** (or multiple DID numbers) on your [**SIPTRUNK** ](https://www.siptrunk.com)account.

> **Note**\
> If you already have active DID numbers on your SIPTRUNK account, you can skip this section and proceed directly to trunk configuration.

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### Create Your SIPTRUNK Account

1. Visit the [SIPTRUNK ](https://www.sipturnk.com)website and sign up for an account.
2. After logging in, ensure that voice services (SIP trunking) are enabled for your account.

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### Purchase DID Numbers

1. In the [SIPTRUN](https://www.sipturnk.com) portal, follow the guide [How to Order a Telephone Number?](https://support.siptrunk.com/hc/en-us/articles/38765340378523-How-to-Order-a-Telephone-Number)  to purchase the DID numbers.

After the DID numbers are successfully purchased and activated, you can proceed with configuring the [SIPTRUN](https://www.sipturnk.com) SIP trunk in PortSIP PBX.

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### Next Step

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

This step configures PortSIP PBX to use SIPTRUNK for outbound and inbound calling.