Objective

This article shows you how to attach a phone number you already own to an Elastic SIP Trunk, so its inbound calls are routed through the trunk.

Product

Elastic SIP Trunking

Environment

Twilio Console

User Account Permission/Role(s) Required

Your role must include permission to read SIP trunks to open the page, and permission to update SIP trunks to attach a number.

Procedure

1. In the Twilio Console, select Communications in the left sidebar.
2. Select Voice, then Elastic SIP Trunking.
3. On the SIP trunks tab, select the trunk, then open the Numbers tab.
4. Select Add a number.
5. In the Add a number panel, choose a number in the Phone number field. The list contains numbers you own that are not yet attached to a trunk; you can type to filter it.
6. Select Add number.
7. A Phone number added. confirmation appears and the number is listed in the table with its Phone number, Friendly name, E911 address status and Emergency address.

Additional Information

• A number can be attached to only one trunk at a time, so numbers already on a trunk do not appear in the picker.
• If the trunk has no numbers yet, the tab shows No phone numbers on this trunk.
• Emergency calling (E911) is configured per number, and the E911 address status column shows each number's current state — for example Registered, Unregistered, Pending, or Registration failed.
• Don't own a suitable number yet? Use Buy a number on the same tab to purchase one and attach it in a single step.
• Select Cancel to close the panel without attaching a number.

This content was generated by AI and reviewed, edited, and verified by a human.