---
page_type: error
code: 30436
message: "30436: Invalid Phone Number SID"
level: ERROR
product: Programmable Messaging
---

## Description

The phone number SID is malformed or belongs to another account.

### Possible Causes

- The phone number SID does not exist or does not belong to your account.
- The phone number SID is not a 34 character string prefixed with "PN"

### Possible Solutions

- Please specify a phone number SID for a toll free number you own.