---
title: "Request phone number verification"
method: POST
path: "/verified_numbers"
tags: ["Verified Numbers"]
---

# Request phone number verification

`POST /verified_numbers`

Initiates phone number verification procedure. Supports DTMF extension dialing for voice calls to numbers behind IVR systems.

## Request body

- object
  - `extension` string — Optional DTMF extension sequence to dial after the call is answered. This parameter enables verification of phone numbers behind IVR systems that require extension dialing. Valid characters: digits 0-9, letters A-D, symbols * and #. Pauses: w = 0.5 second pause, W = 1 second pause. Maximum length: 50 characters. Only works with 'call' verification method.
  - `phone_number` string, required
  - `verification_method` 'sms' | 'call', required — Verification method.

## Response `200`

Expected response to a valid request.

- CreateVerifiedNumberResponse
  - `phone_number` string
  - `verification_method` string

## Other responses

- `400` — Bad Request
- `401` — Unauthorized Request
- `422` — Unprocessable Entity

---

[API](https://skmtc.net/team-telnyx/apis/telnyx-api-2.md) · [All operations](https://skmtc.net/team-telnyx/apis/telnyx-api-2/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/team-telnyx/telnyx-api-2/revisions/3fdc16374d70/schema)