---
title: "Attach Number Pool to Campaign"
method: POST
path: "/number-registration/1/campaigns/{campaignId}/number-pool/attach"
tags: ["platform", "numbers", "number-registration", "campaigns"]
---

# Attach Number Pool to Campaign

`POST /number-registration/1/campaigns/{campaignId}/number-pool/attach`

## 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/number-registration/1/campaigns/{campaignId}/number-pool/attach`
- 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

Associates an existing number pool with a campaign. Number pooling is required when a campaign utilizes more than 49 numbers. This is common in high-throughput environments such as call centers. Attaching a number pool ensures proper provisioning and compliance with carrier requirements.

## Path parameters

- `campaignId` string, uuid, required: The ID of the desired campaign.

## Request body

- 2700ea5ecfd0574f21019319e90eb63416ede8263eab67e466c718c51cd1a77aAttachNumberPoolRequest
  - `numberPoolId` string: Unique identifier of the number pool to be used for this campaign. If not provided, a default number pool will be automatically assigned.
  - `reason` string: A concise explanation of why this campaign requires a dedicated number pool. Include operational or regulatory justifications, such as high-volume messaging, the use of multiple sender identities, or throughput guarantees.

## Response `204`

No Content

## 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)