---
title: "Fetch an instance of an Extension for the Assigned Add-on."
method: GET
path: "/2010-04-01/Accounts/{AccountSid}/IncomingPhoneNumbers/{ResourceSid}/AssignedAddOns/{AssignedAddOnSid}/Extensions/{Sid}.json"
tags: ["Api20100401AssignedAddOnExtension"]
---

# Fetch an instance of an Extension for the Assigned Add-on.

`GET /2010-04-01/Accounts/{AccountSid}/IncomingPhoneNumbers/{ResourceSid}/AssignedAddOns/{AssignedAddOnSid}/Extensions/{Sid}.json`

## Request

- Base URL: `https://api.twilio.com`
- URL: `https://api.twilio.com/2010-04-01/Accounts/{AccountSid}/IncomingPhoneNumbers/{ResourceSid}/AssignedAddOns/{AssignedAddOnSid}/Extensions/{Sid}.json`
- Auth: HTTP basic

Fetch an instance of an Extension for the Assigned Add-on.

## Path parameters

- `AccountSid` string, required
- `ResourceSid` string, required
- `AssignedAddOnSid` string, required
- `Sid` string, required

## Response `200`

OK

- ApiV2010AccountIncomingPhoneNumberIncomingPhoneNumberAssignedAddOnIncomingPhoneNumberAssignedAddOnExtension
  - `sid` string, nullable: The unique string that that we created to identify the resource.
  - `account_sid` string, nullable: The SID of the [Account](https://www.twilio.com/docs/iam/api/account) that created the resource.
  - `resource_sid` string, nullable: The SID of the Phone Number to which the Add-on is assigned.
  - `assigned_add_on_sid` string, nullable: The SID that uniquely identifies the assigned Add-on installation.
  - `friendly_name` string, nullable: The string that you assigned to describe the resource.
  - `product_name` string, nullable: A string that you assigned to describe the Product this Extension is used within.
  - `unique_name` string, nullable: An application-defined string that uniquely identifies the resource. It can be used in place of the resource's `sid` in the URL to address the resource.
  - `uri` string, nullable: The URI of the resource, relative to `https://api.twilio.com`.
  - `enabled` boolean, nullable: Whether the Extension will be invoked.

---

[API](https://skmtc.dev/twilio/apis/twilio-api.md) - [All operations](https://skmtc.dev/twilio/apis/twilio-api/llms.txt) - [OpenAPI document](https://skmtc.dev/twilio/apis/twilio-api/revisions/bfdf249a1298?raw)