/telnyx-numbers-services-java

name: telnyx-numbers-services-java
description: >-
  Configure voicemail, voice channels, and emergency (E911) services for your
  phone numbers. This skill provides Java SDK examples.
metadata:
  author: telnyx
  product: numbers-services
  language: java
  generated_by: telnyx-openapi-pipeline

<!-- Auto-generated from Telnyx OpenAPI specs. Do not edit. -->

Telnyx Numbers Services - Java

Installation

<!-- Maven -->
<dependency>
    <groupId>com.telnyx.sdk</groupId>
    <artifactId>telnyx</artifactId>
    <version>6.95.0</version>
</dependency>

// Gradle
implementation("com.telnyx.sdk:telnyx:6.95.0")

Setup

import com.telnyx.sdk.client.TelnyxClient;
import com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;

// fromEnv() reads TELNYX_API_KEY and TELNYX_PUBLIC_KEY (the public key is required for
// client.webhooks().unwrap() — webhook verification)
TelnyxClient client = TelnyxOkHttpClient.fromEnv();

All examples below assume `client` is already initialized as shown above.

Error Handling

All API calls can fail with network errors, rate limits (429), validation errors (422), or authentication errors (401). Always handle errors in production code:

import com.telnyx.sdk.errors.TelnyxServiceException;

try {
    var result = client.messages().send(params);
} catch (TelnyxServiceException e) {
    System.err.println("API error " + e.statusCode() + ": " + e.getMessage());
    if (e.statusCode() == 422) {
        System.err.println("Validation error — check required fields and formats");
    } else if (e.statusCode() == 429) {
        // Rate limited — wait, then retry the request (bounded exponential backoff)
        Thread.sleep(1000);
        // ...retry the call here (give up after a few attempts)
    }
    throw e; // Re-throw: a failed request must never look like success to the caller
}

Common error codes: `401` invalid API key, `403` insufficient permissions, `404` resource not found, `422` validation error (check field formats), `429` rate limited (retry with exponential backoff).

Important Notes

• **Pagination:** List methods return a page. Use `.autoPager()` for automatic iteration: `for (var item : page.autoPager()) { ... }`. For manual control, use `.hasNextPage()` and `.nextPage()`.

List your voice channels for non-US zones

Returns the non-US voice channels for your account. voice channels allow you to use Channel Billing for calls to your Telnyx phone numbers. Please check the Telnyx Support Articles section for full information and examples of how to utilize Channel Billing.

`GET /channel_zones`

import com.telnyx.sdk.models.channelzones.ChannelZoneListPage;
import com.telnyx.sdk.models.channelzones.ChannelZoneListParams;

ChannelZoneListPage page = client.channelZones().list();

Returns: `channels` (int64), `countries` (array[string]), `created_at` (string), `id` (string), `name` (string), `record_type` (enum: channel_zone), `updated_at` (string)

Update voice channels for non-US Zones

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.

`PUT /channel_zones/{channel_zone_id}` — Required: `channels`

import com.telnyx.sdk.models.channelzones.ChannelZoneUpdateParams;
import com.telnyx.sdk.models.channelzones.ChannelZoneUpdateResponse;

ChannelZoneUpdateParams params = ChannelZoneUpdateParams.builder()
    .channelZoneId("550e8400-e29b-41d4-a716-446655440000")
    .channels(0L)
    .build();
ChannelZoneUpdateResponse channelZone = client.channelZones().update(params);

Returns: `channels` (int64), `countries` (array[string]), `created_at` (string), `id` (string), `name` (string), `record_type` (enum: channel_zone), `updated_at` (string)

List dynamic emergency addresses

Returns the dynamic emergency addresses according to filters

`GET /dynamic_emergency_addresses`

import com.telnyx.sdk.models.dynamicemergencyaddresses.DynamicEmergencyAddressListPage;
import com.telnyx.sdk.models.dynamicemergencyaddresses.DynamicEmergencyAddressListParams;

DynamicEmergencyAddressListPage page = client.dynamicEmergencyAddresses().list();

Returns: `administrative_area` (string), `country_code` (enum: US, CA, PR), `created_at` (string), `extended_address` (string), `house_number` (string), `house_suffix` (string), `id` (string), `locality` (string), `postal_code` (string), `record_type` (string), `sip_geolocation_id` (string), `status` (enum: pending, activated, rejected), `street_name` (string), `street_post_directional` (string), `street_pre_directional` (string), `street_suffix` (string), `updated_at` (string)

Create a dynamic emergency address.

Creates a dynamic emergency address, the validated physical location used when provisioning dynamic emergency endpoints.

`POST /dynamic_emergency_addresses` — Required: `house_number`, `street_name`, `locality`, `administrative_area`, `postal_code`, `country_code`

Optional: `created_at` (string), `extended_address` (string), `house_suffix` (string), `id` (string), `record_type` (string), `sip_geolocation_id` (string), `status` (enum: pending, activated, rejected), `street_post_directional` (string), `street_pre_directional` (string), `street_suffix` (string), `updated_at` (string)

import com.telnyx.sdk.models.dynamicemergencyaddresses.DynamicEmergencyAddress;
import com.telnyx.sdk.models.dynamicemergencyaddresses.DynamicEmergencyAddressCreateResponse;

DynamicEmergencyAddress params = DynamicEmergencyAddress.builder()
    .administrativeArea("TX")
    .countryCode(DynamicEmergencyAddress.CountryCode.US)
    .houseNumber("600")
    .locality("Austin")
    .postalCode("78701")
    .streetName("Congress")
    .build();
DynamicEmergencyAddressCreateResponse dynamicEmergencyAddress = client.dynamicEmergencyAddresses().create(params);

Returns: `