> ## Documentation Index
> Fetch the complete documentation index at: https://docs.surge.app/llms.txt
> Use this file to discover all available pages before exploring further.

# phone_number.attached_to_campaign

> Fires when a phone number is successfully attached to a campaign and is ready for production messaging.

Fires when a phone number is successfully attached to a specific campaign. After this event, the number is ready to send production-volume messages under that campaign's registered use cases.

## Common use case

Use `phone_number.attached_to_campaign` to confirm that a number is ready for production sends, for example, to flip a status flag in your own database or to notify the end customer that their number is active.


## OpenAPI

````yaml webhook phoneNumberAttachedToCampaign
openapi: 3.1.1
info:
  title: Surge
  version: '1.0'
servers:
  - url: https://api.surge.app
security:
  - authorization: []
paths: {}
components:
  securitySchemes:
    authorization:
      bearerFormat: Surge API token
      scheme: bearer
      type: http

````