---
title: "Check for phone numbers on a list"
method: GET
path: "/signals/1/trusted-msisdns/{msisdn}/check"
tags: ["platform", "signals", "trusted-phone-numbers-1"]
---

# Check for phone numbers on a list

`GET /signals/1/trusted-msisdns/{msisdn}/check`

## Request

- Base URL: `https://api.infobip.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.infobip.com/signals/1/trusted-msisdns/{msisdn}/check`
- Auth: one of:
  - OAuth 2
    - Client credentials
    - Token URL: `https://api.infobip.com/auth/1/oauth2/token`
  - API key in header `Authorization`
  - API key in header `Authorization`
  - HTTP basic

Check whether a phone number exists on a trusted MSISDN list.


**Intended for non-CPaaSX accounts.** CPaaSX accounts should use the CPaaSX Signals trusted MSISDNs API.

## Path parameters

- `msisdn` string, required

## Response `200`

OK

- 6ac22f6f3346b6db1d4c8464d58b1329c30df516bb4206699a93fd8658df38c7TrustedMsisdnCheckResponse: Trusted MSISDN check response object.
  - `exists` boolean: Whether the provided phone number exists in the trusted MSISDN list.

## Other responses

- `400`: Bad request
- `401`: Unauthorized
- `403`: Forbidden
- `404`: Not Found
- `429`: Too Many Requests
- `500`: Internal Server Error

---

[API](https://skmtc.dev/infobip/apis/infobip-openapi-specification.md) - [All operations](https://skmtc.dev/infobip/apis/infobip-openapi-specification/llms.txt) - [OpenAPI document](https://skmtc.dev/infobip/apis/infobip-openapi-specification/revisions/9dcbbaf902de?raw)