---
title: "Create a new IpAddress resource."
method: POST
path: "/2010-04-01/Accounts/{AccountSid}/SIP/IpAccessControlLists/{IpAccessControlListSid}/IpAddresses.json"
tags: ["Api20100401SipIpAddress"]
---

# Create a new IpAddress resource.

`POST /2010-04-01/Accounts/{AccountSid}/SIP/IpAccessControlLists/{IpAccessControlListSid}/IpAddresses.json`

## Request

- Base URL: `https://api.twilio.com`
- URL: `https://api.twilio.com/2010-04-01/Accounts/{AccountSid}/SIP/IpAccessControlLists/{IpAccessControlListSid}/IpAddresses.json`
- Auth: HTTP basic

Create a new IpAddress resource.

## Path parameters

- `AccountSid` string, required
- `IpAccessControlListSid` string, required

## Request body `application/x-www-form-urlencoded`

- object
  - `FriendlyName` string, required: A human readable descriptive text for this resource, up to 255 characters long.
  - `IpAddress` string, required: An IP address in dotted decimal notation from which you want to accept traffic. Any SIP requests from this IP address will be allowed by Twilio. IPv4 only supported today.
  - `CidrPrefixLength` integer: An integer representing the length of the CIDR prefix to use with this IP address when accepting traffic. By default the entire IP address is used.

## Response `201`

Created

- ApiV2010AccountSipSipIpAccessControlListSipIpAddress
  - `sid` string, nullable: A 34 character string that uniquely identifies this resource.
  - `account_sid` string, nullable: The unique id of the Account that is responsible for this resource.
  - `friendly_name` string, nullable: A human readable descriptive text for this resource, up to 255 characters long.
  - `ip_address` string, nullable: An IP address in dotted decimal notation from which you want to accept traffic. Any SIP requests from this IP address will be allowed by Twilio. IPv4 only supported today.
  - `cidr_prefix_length` integer: An integer representing the length of the CIDR prefix to use with this IP address when accepting traffic. By default the entire IP address is used.
  - `ip_access_control_list_sid` string, nullable: The unique id of the IpAccessControlList resource that includes this resource.
  - `date_created` string, date-time-rfc-2822, nullable: The date that this resource was created, given as GMT in [RFC 2822](https://www.php.net/manual/en/class.datetime.php#datetime.constants.rfc2822) format.
  - `date_updated` string, date-time-rfc-2822, nullable: The date that this resource was last updated, given as GMT in [RFC 2822](https://www.php.net/manual/en/class.datetime.php#datetime.constants.rfc2822) format.
  - `uri` string, nullable: The URI for this resource, relative to `https://api.twilio.com`

## Changes

- **2024-12-12** (v2010) `38b56fcfbe0e`: 2 info
  - api tag `Api20100401SipIpAddress` added
  - api tag `Api20100401IpAddress` removed
- **2024-08-26** (v2010) `47a91f5ec38f`: 1 info
  - the `cidr_prefix_length` response's property default value `0` was added for the status `201`

[Operation history](https://skmtc.dev/twilio/apis/api-v2010/changes/2010-04-01/Accounts/:AccountSid/SIP/IpAccessControlLists/:IpAccessControlListSid/IpAddresses.json/post.md)

---

[API](https://skmtc.dev/twilio/apis/api-v2010.md) - [All operations](https://skmtc.dev/twilio/apis/api-v2010/llms.txt) - [OpenAPI document](https://skmtc.dev/twilio/apis/api-v2010/revisions/bfdf249a1298?raw)