---
title: "POST /2013-04-01/cidrcollection/{CidrCollectionId}"
method: POST
path: "/2013-04-01/cidrcollection/{CidrCollectionId}"
---

# POST /2013-04-01/cidrcollection/{CidrCollectionId}

`POST /2013-04-01/cidrcollection/{CidrCollectionId}`

Creates, changes, or deletes CIDR blocks within a collection. Contains authoritative IP information mapping blocks to one or multiple locations.

A change request can update multiple locations in a collection at a time, which is helpful if you want to move one or more CIDR blocks from one location to another in one transaction, without downtime.

**Limits**

The max number of CIDR blocks included in the request is 1000. As a result, big updates require multiple API calls.

**PUT and DELETE\_IF\_EXISTS**

Use `ChangeCidrCollection` to perform the following actions:

*   `PUT`: Create a CIDR block within the specified collection.
    
*   `DELETE_IF_EXISTS`: Delete an existing CIDR block from the collection.

## Path parameters

- `CidrCollectionId` string, required

## Response `200`

Success

## Other responses

- `480` — NoSuchCidrCollectionException
- `481` — CidrCollectionVersionMismatchException
- `482` — InvalidInput
- `483` — CidrBlockInUseException
- `484` — LimitsExceeded
- `485` — ConcurrentModification

---

[API](https://skmtc.net/aws/apis/route53.md) · [All operations](https://skmtc.net/aws/apis/route53/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/aws/route53/versions/8f06f4790bfa/schema)