---
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}`

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

> 93 revisions in range; 1 not diffed.

- **2026-09-16** `a6a61a29ecdd` — 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`
- **2026-08-17** `1571b0380bd7` — 1 breaking
  - the `errors/items/code` response's property type changed from `integer` to `string`, and format from `int32` to no format for status `default`
- **2026-08-04** `8f5f4e537994` — 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`

[Change history](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/changes/channel_zones/:channel_zone_id/put.md)

---

[API](https://skmtc.dev/team-telnyx/apis/telnyx-api-2.md) · [All operations](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/llms.txt) · [OpenAPI document](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/revisions/88481995b4ca?raw)