# 11100: Invalid URL format

Log Type: APPLICATION

Log Level: ERROR

## Description

The format of the provided URL is invalid.

### Possible causes

* Bad URL for phone number configuration
* Bad URL passed to outgoing call REST request
* Bad URL in Play or Redirect Verb Body
* Bad URL provided for a verb's action attribute
* No URL provided in Record verb action attribute when modifying a live call
* Unsupported characters in auth portion of URL

### Possible solutions

* Make sure you submit a fully qualified URL including: protocol (http:// or https://), hostname, file path, properly url-encoded query parameters.
* Twilio must be able to reach this URL over the public Internet.