---
title: "Set Org Default Phone Number"
method: POST
path: "/v2/phone-numbers/{phone_number_id}/set-default"
tags: ["phone-numbers"]
---

# Set Org Default Phone Number

`POST /v2/phone-numbers/{phone_number_id}/set-default`

## Request

- Base URL: `https://api.stuut.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://api.stuut.ai/v2/phone-numbers/{phone_number_id}/set-default`
- Auth: HTTP bearer

Make the number the organization's default caller ID. The org default is standalone — a number
assigned to a business unit can't be it. The previous default is unset in the same transaction.

## Path parameters

- `phone_number_id` string, required

## Response `200`

Successful Response

- PhoneNumber
  - `created_at` string, date-time, required
  - `modified_at` string, date-time, nullable, required
  - `id` string, required
  - `phone_number` string, phone, required: The number, E.164.
  - `iso_country` string, nullable, required: ISO 3166-1 country code of the number.
  - `status` 'provisioning' | 'active', required
  - `voice` boolean, required: Whether the number is voice-capable.
  - `sms` boolean, required: Whether the number is SMS-capable.
  - `label` string, nullable, required: Optional human-friendly label.
  - `is_default` boolean, required: The org's fallback number, used when a partner has no language/country/BU match.
  - `business_identity_id` string, nullable, required: Legal entity / Twilio Secondary Profile this number is registered under (CNAM/SHAKEN/VI).
  - `business_units` BusinessUnit[], required: Business units this number is assigned to.
    - `created_at` string, date-time, required
    - `modified_at` string, date-time, nullable, required
    - `id` string, required
    - `name` string, required: The name of the business unit.
    - `description` string, nullable, required: Optional description of the business unit.
    - `display_name` string, nullable, required: Customer-facing BU name for outbound content; NULL uses the organization name.
    - `default_phone_number_id` string, nullable, required: The BU's fallback number, used when none of its numbers match the destination country.
    - `business_identity_id` string, nullable, required: The BU's own legal entity / Twilio Secondary Profile; NULL if it shares the org's identity.
    - `verification_status` 'draft' | 'pending_review' | 'in_review' | 'twilio_approved' | 'twilio_rejected', required: Verification state of a business identity's Twilio Secondary Profile. Member names mirror Twilio's vocabulary, so the only difference from its wire strings is the separator — Twilio hyphenates (``twilio-approved``) where a Python name can't. ``from_twilio`` converts on that one character, which keeps the hyphenated spelling out of the enum, the column (which stores the NAME) and our API without a lookup table to keep in sync.
    - `member_ids` string[], required
    - `object` string, required: String representing the object's type. Objects of the same type share the same value.
  - `object` string, required: String representing the object's type. Objects of the same type share the same value.

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/stuut/apis/stuut-api.md) - [All operations](https://skmtc.dev/stuut/apis/stuut-api/llms.txt) - [OpenAPI document](https://skmtc.dev/stuut/apis/stuut-api/revisions/ff0ad16a55ff?raw)