---
title: "Update voice channels for non-US Zones"
method: PUT
path: "/channel_zones/{channel_zone_id}"
tags: ["Voice Channels"]
---

# Update voice channels for non-US Zones

`PUT /channel_zones/{channel_zone_id}`

## Request

- Base URL: `https://api.telnyx.com/v2`
- URL: `https://api.telnyx.com/v2/channel_zones/{channel_zone_id}`
- Auth: HTTP bearer

Update the number of Voice Channels for the Non-US Zones. This allows your account to handle multiple simultaneous inbound calls to Non-US numbers. Use this endpoint to increase or decrease your capacity based on expected call volume.

## Request body

- object
  - `channels` integer, required: The number of reserved channels

## Response `200`

Successfuly patched channel zone

- GcbChannelZone
  - `record_type` 'channel_zone', required
  - `countries` string[], required: List of countries (in ISO 3166-2, capitalized) members of the billing channel zone
  - `id` string, required
  - `name` string, required
  - `channels` integer, required
  - `created_at` string: ISO 8601 formatted date of when the channel zone was created
  - `updated_at` string: ISO 8601 formatted date of when the channel zone was updated

## Other responses

- `400`: Bad request
- `401`: Unauthorized
- `404`: Resource not found
- `default`: Unexpected error

## Changes

- **2026-10-21** `67df31283a8a`: 1 breaking, 1 info
  - the `errors/items/code` response's property type changed from `integer` to `string`, and format from `int32` to no format for status `default`
  - added the optional property `errors/items/description` to the response with the `default` status
- **2026-10-15** `a72569d69430`: 1 breaking
  - the `errors/items/code` response's property type changed from `string` to `integer`, and format from no format to `int32` for status `default`

[Operation history](https://skmtc.dev/team-telnyx/apis/telnyx-api/changes/channel_zones/:channel_zone_id/put.md)

---

[API](https://skmtc.dev/team-telnyx/apis/telnyx-api.md) - [All operations](https://skmtc.dev/team-telnyx/apis/telnyx-api/llms.txt) - [OpenAPI document](https://skmtc.dev/team-telnyx/apis/telnyx-api/revisions/0f17b8167873?raw)