Look up operator information for a phone number using Azure Communication Services

Artikel
28/02/2025

Get started with the Phone Numbers client library for JavaScript to look up operator information for phone numbers. Use the operator information to determine whether and how to communicate with that phone number. Follow these steps to install the package and look up operator information about a phone number.

Nota

To view the source code for this example, see Manage Phone Numbers - JavaScript | GitHub.

Prerequisites

An Azure account with an active subscription. Create an account for free.
Node.js Active LTS (long-term support) and Maintenance LTS versions (8.11.1 and 10.14.1 recommended).
An active Communication Services resource and connection string. Create a Communication Services resource.

Prerequisite check

In a terminal or command window, run the node --version command to check that Node.js is installed.

Setting up

To set up an environment for sending lookup queries, take the steps in the following sections.

Create a new Node.js Application

In a terminal or command window, create a new directory for your app and navigate to it.

Console

mkdir number-lookup-quickstart && cd number-lookup-quickstart

Run npm init -y to create a package.json file with default settings.

Console

npm init -y

Create a file called number-lookup-quickstart.js in the root of the directory you created. Add the following snippet to it:

JavaScript

async function main() {
    // quickstart code will go here
}

main();

Install the package

Use the npm install command to install the Azure Communication Services Phone Numbers client library for JavaScript.

Console

npm install @azure/communication-phone-numbers@1.3.0 --save

The --save option adds the library as a dependency in your package.json file.

Code examples

Authenticate the client

Import the PhoneNumbersClient from the client library and instantiate it with your connection string, which can be acquired from an Azure Communication Services resource in the Azure portal. Using a COMMUNICATION_SERVICES_CONNECTION_STRING environment variable is recommended to avoid putting your connection string in plain text within your code. Learn how to manage your resource's connection string.

Add the following code to the top of number-lookup-quickstart.js:

JavaScript

const { PhoneNumbersClient } = require('@azure/communication-phone-numbers');

// This code retrieves your connection string from an environment variable
const connectionString = process.env['COMMUNICATION_SERVICES_CONNECTION_STRING'];

// Instantiate the phone numbers client
const phoneNumbersClient = new PhoneNumbersClient(connectionString);

Look up phone number formatting

To search for a phone number's operator information, call searchOperatorInformation from the PhoneNumbersClient.

JavaScript

let formattingResults = await phoneNumbersClient.searchOperatorInformation([ "<target-phone-number>" ]);

Replace <target-phone-number> with the phone number you're looking up, usually a number you'd like to send a message to.

Amaran

Provide phone numbers in E.164 international standard format, for example, +14255550123.

Look up operator information for a number

To search for a phone number's operator information, call searchOperatorInformation from the PhoneNumbersClient, passing true for the includeAdditionalOperatorDetails option.

JavaScript

let searchResults = await phoneNumbersClient.searchOperatorInformation([ "<target-phone-number>" ], { "includeAdditionalOperatorDetails": true });

Amaran

Using this function incurs a charge to your account.

Use operator information

You can now use the operator information. For this quickstart guide, we can print some of the details to the console.

First, we can print details about the number format.

JavaScript

let formatInfo = formattingResults.values[0];
console.log(formatInfo.phoneNumber + " is formatted " + formatInfo.internationalFormat + " internationally, and " + formatInfo.nationalFormat + " nationally");

Next, we can print details about the phone number and operator.

JavaScript

let operatorInfo = searchResults.values[0];
console.log(operatorInfo.phoneNumber + " is a " + (operatorInfo.numberType ? operatorInfo.numberType : "unknown") + " number, operated in "
    + operatorInfo.isoCountryCode + " by " + (operatorInfo.operatorDetails.name ? operatorInfo.operatorDetails.name : "an unknown operator"));

You can also use the operator information to determine whether to send an SMS. For more information, see Send an SMS message.

Run the code

Run the application from your terminal or command window with the node command.

Console

node number-lookup-quickstart.js

Sample code

You can download the sample app from Manage Phone Numbers - JavaScript | GitHub).

Get started with the Phone Numbers client library for C# to look up operator information for phone numbers. Use the operator information to determine whether and how to communicate with that phone number. Follow these steps to install the package and look up operator information about a phone number.

Nota

To view the source code for this example, see Manage Phone Numbers - C# | GitHub.

Prerequisites

An Azure account with an active subscription. Create an account for free.
The latest version of .NET Core client library for your operating system.
An active Communication Services resource and connection string. Create a Communication Services resource.

Prerequisite check

In a terminal or command window, run the dotnet command to check that the .NET SDK is installed.

Setting up

To set up an environment for sending lookup queries, take the steps in the following sections.

Create a new C# application

In a terminal or command window, run the dotnet new command to create a new console app with the name NumberLookupQuickstart. This command creates a simple "Hello World" C# project with a single source file, Program.cs.

Console

dotnet new console -o NumberLookupQuickstart

Change your directory to the newly created app folder and use the dotnet build command to compile your application.

Console

cd NumberLookupQuickstart
dotnet build

Connect to dev package feed

The public preview version of the SDK is published to a dev package feed. You can add the dev feed using the NuGet CLI, which adds it to the NuGet.Config file.

Console

nuget sources add -Name "Azure SDK for .NET Dev Feed" -Source "https://pkgs.dev.azure.com/azure-sdk/public/_packaging/azure-sdk-for-net/nuget/v3/index.json"

More detailed information and other options for connecting to the dev feed can be found in the contributing guide.

Install the package

While still in the application directory, install the Azure Communication Services PhoneNumbers client library for .NET package by using the following command.

Console

dotnet add package Azure.Communication.PhoneNumbers --version 1.3.0

Add a using directive to the top of Program.cs to include the Azure.Communication namespace.

using System;
using System.Threading.Tasks;
using Azure.Communication.PhoneNumbers;

Update Main function signature to be async.

internal class Program
{
    static async Task Main(string[] args)
    {
        ...
    }
}

Code examples

Authenticate the client

Phone Number clients can be authenticated using connection string acquired from an Azure Communication Services resource in the Azure portal. Using a COMMUNICATION_SERVICES_CONNECTION_STRING environment variable is recommended to avoid putting your connection string in plain text within your code. Learn how to manage your resource's connection string.

// This code retrieves your connection string from an environment variable.
string? connectionString = Environment.GetEnvironmentVariable("COMMUNICATION_SERVICES_CONNECTION_STRING");

PhoneNumbersClient client = new PhoneNumbersClient(connectionString, new PhoneNumbersClientOptions(PhoneNumbersClientOptions.ServiceVersion.V2024_03_01_Preview));

Phone Number clients can also authenticate with Microsoft Entra authentication. With this option, AZURE_CLIENT_SECRET, AZURE_CLIENT_ID, and AZURE_TENANT_ID environment variables need to be set up for authentication.

// Get an endpoint to our Azure Communication Services resource.
Uri endpoint = new Uri("<endpoint_url>");
TokenCredential tokenCredential = new DefaultAzureCredential();
client = new PhoneNumbersClient(endpoint, tokenCredential);

Look up phone number formatting

To look up the national and international formatting for a number, call SearchOperatorInformationAsync from the PhoneNumbersClient.

OperatorInformationResult formattingResult = await client.SearchOperatorInformationAsync(new[] { "<target-phone-number>" });

Replace <target-phone-number> with the phone number you're looking up, usually a number you'd like to send a message to.

Amaran

Provide phone numbers in E.164 international standard format, for example, +14255550123.

Look up operator information for a number

To search for a phone number's operator information, call SearchOperatorInformationAsync from the PhoneNumbersClient, passing true for the IncludeAdditionalOperatorDetails option.

OperatorInformationResult searchResult = await client.SearchOperatorInformationAsync(new[] { "<target-phone-number>" }, new OperatorInformationOptions() { IncludeAdditionalOperatorDetails = true });

Amaran

Using this function incurs a charge to your account.

Use operator information

You can now use the operator information. For this quickstart guide, we can print some of the details to the console.

First, we can print details about the number format.

OperatorInformation formattingInfo = formattingResult.Values[0];
Console.WriteLine($"{formattingInfo.PhoneNumber} is formatted {formattingInfo.InternationalFormat} internationally, and {formattingInfo.NationalFormat} nationally");

Next, we can print details about the phone number and operator.

OperatorInformation operatorInformation = searchResult.Values[0];
Console.WriteLine($"{operatorInformation.PhoneNumber} is a {operatorInformation.NumberType ?? "unknown"} number, operated in {operatorInformation.IsoCountryCode} by {operatorInformation.OperatorDetails.Name ?? "an unknown operator"}");

You can also use the operator information to determine whether to send an SMS. For more information about sending an SMS, see Send an SMS message.

Run the code

Run the application from your terminal or command window with the dotnet run command.

Console

dotnet run --interactive

Sample code

You can download the sample app from Manage Phone Numbers - C# | GitHub.

Get started with the Phone Numbers client library for Java to look up operator information for phone numbers. Use the operator information to determine whether and how to communicate with that phone number. Follow these steps to install the package and look up operator information about a phone number.

Nota

To view the source code for this example, see Manage Phone Numbers - Java | GitHub.

Prerequisites

An Azure account with an active subscription. Create an account for free.
Java Development Kit (JDK) version 8 or above.
Apache Maven.
An active Communication Services resource and connection string. Create a Communication Services resource.

Prerequisite check

In a terminal or command window, run the mvn -v command to check that Maven is installed.

Setting up

To set up an environment for sending lookup queries, take the steps in the following sections.

Create a new Java application

In a terminal or command window, navigate to the directory where you'd like to create your Java application. Run the following command to generate the Java project from the maven-archetype-quickstart template.

Console

mvn archetype:generate -DgroupId=com.communication.lookup.quickstart -DartifactId=communication-lookup-quickstart -DarchetypeArtifactId=maven-archetype-quickstart -DarchetypeVersion=1.4 -DinteractiveMode=false

The 'generate' task creates a directory with the same name as the artifactId. Under this directory, the src/main/java directory contains the project source code, the src/test/java directory contains the test source, and the pom.xml file is the project's Project Object Model, or POM.

Connect to dev package feed

The public preview version of the SDK is published to a dev package feed. To connect to the dev feed, open the pom.xml file in your text editor and add the dev repo to both your pom.xml's <repositories> and <distributionManagement> sections that you can add if they don't already exist.

XML

<repository>
  <id>azure-sdk-for-java</id>
  <url>https://pkgs.dev.azure.com/azure-sdk/public/_packaging/azure-sdk-for-java/maven/v1</url>
  <releases>
    <enabled>true</enabled>
  </releases>
  <snapshots>
    <enabled>true</enabled>
  </snapshots>
</repository>

You might need to add or edit the settings.xml file in ${user.home}/.m2

XML

<server>
  <id>azure-sdk-for-java</id>
  <username>azure-sdk</username>
  <password>[PERSONAL_ACCESS_TOKEN]</password>
</server>

You can generate a Personal Access Token with Packaging read & write scopes and paste it into the <password> tag.

More detailed information and other options for connecting to the dev feed can be found here.

Install the package

Add the following dependency elements to the group of dependencies in the pom.xml file.

XML

<dependencies>
  <dependency>
    <groupId>com.azure</groupId>
    <artifactId>azure-communication-common</artifactId>
    <version>1.0.0</version>
  </dependency>

  <dependency>
    <groupId>com.azure</groupId>
    <artifactId>azure-communication-phonenumbers</artifactId>
    <version>1.2.0</version>
  </dependency>

  <dependency>
    <groupId>com.azure</groupId>
    <artifactId>azure-identity</artifactId>
    <version>1.2.3</version>
  </dependency>

  <dependency>
    <groupId>com.azure</groupId>
    <artifactId>azure-core</artifactId>
    <version>1.41.0</version>
  </dependency>
</dependencies>

Check the properties section to ensure your project is targeting Maven version 1.8 or above.

XML

<properties>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  <maven.compiler.source>1.8</maven.compiler.source>
  <maven.compiler.target>1.8</maven.compiler.target>
</properties>

Code examples

Set up the app framework

From the project directory:

Navigate to the /src/main/java/com/communication/lookup/quickstart directory
Open the App.java file in your editor
Replace the System.out.println("Hello world!"); statement
Add import directives

Use the following code to begin:

Java

package com.communication.lookup.quickstart;

import com.azure.communication.phonenumbers.*;
import com.azure.communication.phonenumbers.models.*;
import com.azure.core.http.rest.*;
import com.azure.core.util.Context;
import com.azure.identity.*;
import java.io.*;
import java.util.ArrayList;

public class App
{
    public static void main( String[] args ) throws IOException
    {
        System.out.println("Azure Communication Services - Number Lookup Quickstart");
        // Quickstart code goes here
    }
}

Authenticate the client

The client can be authenticated using a connection string acquired from an Azure Communication Services resource in the Azure portal. Using a COMMUNICATION_SERVICES_CONNECTION_STRING environment variable is recommended to avoid putting your connection string in plain text within your code. Learn how to manage your resource's connection string.

Java

// This code retrieves your connection string from an environment variable
String connectionString = System.getenv("COMMUNICATION_SERVICES_CONNECTION_STRING");

PhoneNumbersClient phoneNumberClient = new PhoneNumbersClientBuilder()
    .connectionString(connectionString)
    .buildClient();

Alternatively, you can authenticate using Microsoft Entra authentication. Using the DefaultAzureCredentialBuilder is the easiest way to get started with Microsoft Entra ID. You can acquire your resource name from an Azure Communication Services resource in the Azure portal.

Java

// You can find your resource name from your resource in the Azure portal
String endpoint = "https://<RESOURCE_NAME>.communication.azure.com";

PhoneNumbersClient phoneNumberClient = new PhoneNumbersClientBuilder()
    .endpoint(endpoint)
    .credential(new DefaultAzureCredentialBuilder().build())
    .buildClient();

Look up phone number formatting

To look up the national and international formatting for a number, call searchOperatorInformation from the PhoneNumbersClient.

Java

ArrayList<String> phoneNumbers = new ArrayList<String>();
phoneNumbers.add("<target-phone-number>");

// Use the free number lookup functionality to get number formatting information
OperatorInformationResult formattingResult = phoneNumberClient.searchOperatorInformation(phoneNumbers);
OperatorInformation formattingInfo = formattingResult.getValues().get(0);

Replace <target-phone-number> with the phone number you're looking up, usually a number you'd like to send a message to.

Amaran

Provide phone numbers in E.164 international standard format, for example, +14255550123.

Look up operator information for a number

To search for a phone number's operator information, call searchOperatorInformationWithResponse from the PhoneNumbersClient, passing true for the IncludeAdditionalOperatorDetails option.

Java

OperatorInformationOptions options = new OperatorInformationOptions();
options.setIncludeAdditionalOperatorDetails(true);
Response<OperatorInformationResult> result = phoneNumberClient.searchOperatorInformationWithResponse(phoneNumbers, options, Context.NONE);
OperatorInformation operatorInfo = result.getValue().getValues().get(0);

Amaran

Using this function incurs a charge to your account.

Use operator information

You can now use the operator information. For this quickstart guide, we can print some of the details to the console.

First, we can print details about the number format.

Java

System.out.println(formattingInfo.getPhoneNumber() + " is formatted "
    + formattingInfo.getInternationalFormat() + " internationally, and "
    + formattingInfo.getNationalFormat() + " nationally");

Next, we can print details about the phone number and operator.

Java

String numberType = operatorInfo.getNumberType() == null ? "unknown" : operatorInfo.getNumberType().toString();
String operatorName = "an unknown operator";
if (operatorInfo.getOperatorDetails()!= null && operatorInfo.getOperatorDetails().getName() != null)
{
    operatorName = operatorInfo.getOperatorDetails().getName();
}
System.out.println(operatorInfo.getPhoneNumber() + " is a " + numberType + " number, operated in "
    + operatorInfo.getIsoCountryCode() + " by " + operatorName);

You can also use the operator information to determine whether to send an SMS. For more information, see Send an SMS message.

Run the code

Run the application from your terminal or command window with the following commands: Navigate to the directory containing the pom.xml file and compile the project.

Console

mvn compile

Then, build the package.

Console

mvn package

To execute the app, use the mvn command.

Console

mvn exec:java -D"exec.mainClass"="com.communication.lookup.quickstart.App" -D"exec.cleanupDaemonThreads"="false"

Sample code

You can download the sample app from Manage Phone Numbers - Java | GitHub.

Get started with the Phone Numbers client library for Python to look up operator information for phone numbers. Use the operator information to determine whether and how to communicate with that phone number. Follow these steps to install the package and look up operator information about a phone number.

Nota

To view the source code for this example, see Manage Phone Numbers - Python | GitHub.

Prerequisites

An Azure account with an active subscription. Create an account for free.
Python 3.7+.
An active Communication Services resource and connection string. Create a Communication Services resource.

Prerequisite check

In a terminal or command window, run the python --version command to check that Python is installed.

Setting up

To set up an environment for sending lookup queries, take the steps in the following sections.

Create a new Python application

In a terminal or command window, create a new directory for your app and navigate to it.

Console

mkdir number-lookup-quickstart && cd number-lookup-quickstart

Use a text editor to create a file called number_lookup_sample.py in the project root directory and add the following code. The remaining quickstart code is added in the following sections.

Python

import os
from azure.communication.phonenumbers import PhoneNumbersClient

try:
   print('Azure Communication Services - Number Lookup Quickstart')
   # Quickstart code goes here
except Exception as ex:
   print('Exception:')
   print(ex)

Install the package

While still in the application directory, install the Azure Communication Services PhoneNumbers client library for Python package by using the pip install command.

Console

pip install azure-communication-phonenumbers==1.2.0

Code examples

Authenticate the client

Python

# This code retrieves your connection string from an environment variable
connection_string = os.getenv('COMMUNICATION_SERVICES_CONNECTION_STRING')
try:
    phone_numbers_client = PhoneNumbersClient.from_connection_string(connection_string)
except Exception as ex:
    print('Exception:')
    print(ex)

Alternatively, the client can be authenticated using Microsoft Entra authentication. Using the DefaultAzureCredential object is the easiest way to get started with Microsoft Entra ID and you can install it using the pip install command.

Console

pip install azure-identity

Creating a DefaultAzureCredential object requires you to have AZURE_CLIENT_ID, AZURE_CLIENT_SECRET, and AZURE_TENANT_ID already set as environment variables with their corresponding values from your registered Microsoft Entra application.

For a ramp-up on how to get these environment variables, you can learn how to set up service principals from CLI.

Once the azure-identity library is installed, you can continue authenticating the client.

Python

from azure.identity import DefaultAzureCredential

# You can find your endpoint from your resource in the Azure portal
endpoint = 'https://<RESOURCE_NAME>.communication.azure.com'
try:
    credential = DefaultAzureCredential()
    phone_numbers_client = PhoneNumbersClient(endpoint, credential)
except Exception as ex:
    print('Exception:')
    print(ex)

Look up phone number formatting

To look up the national and international formatting for a number, call search_operator_information from the PhoneNumbersClient.

Python

formatting_results = phone_numbers_client.search_operator_information("<target-phone-number>")

Replace <target-phone-number> with the phone number you're looking up, usually a number you'd like to send a message to.

Amaran

Provide phone numbers in E.164 international standard format, for example, +14255550123.

Look up operator information for a number

To search for a phone number's operator information, call search_operator_information from the PhoneNumbersClient, passing True for the include_additional_operator_details option.

Python

options = { "include_additional_operator_details": True }
operator_results = phone_numbers_client.search_operator_information("<target-phone-number>", options=options)

Amaran

Using this function incurs a charge to your account.

Use operator information

You can now use the operator information. For this quickstart guide, we can print some of the details to the console.

First, we can print details about the number format.

Python

formatting_info = formatting_results.values[0]
print(str.format("{0} is formatted {1} internationally, and {2} nationally", formatting_info.phone_number, formatting_info.international_format, formatting_info.national_format))

Next, we can print details about the phone number and operator.

Python

operator_information = operator_results.values[0]

number_type = operator_information.number_type if operator_information.number_type else "unknown"
if operator_information.operator_details is None or operator_information.operator_details.name is None:
    operator_name = "an unknown operator"
else:
    operator_name = operator_information.operator_details.name

print(str.format("{0} is a {1} number, operated in {2} by {3}", operator_information.phone_number, number_type, operator_information.iso_country_code, operator_name))

You can also use the operator information to determine whether to send an SMS. For more information about sending an SMS, see Send an SMS message.

Run the code

Run the application from your terminal or command window with the python command.

Console

python number_lookup_sample.py

Sample code

You can download the sample app from Manage Phone Numbers - Python | GitHub.

Troubleshooting

Common questions and issues:

Changes to environment variables might not take effect in programs that are already running. If you notice your environment variables aren't working as expected, try closing and reopening any programs you're using to run and edit code.
The data returned by this endpoint is subject to various international laws and regulations, therefore the accuracy of the results depends on several factors. These factors include whether the number was ported, the country code, and the approval status of the caller. Based on these factors, operator information might not be available for some phone numbers or could reflect the original operator of the phone number, not the current operator.

Next steps

This article described how to:

Look up number formatting
Look up operator information for a phone number

Number Lookup Concept

Number Lookup SDK

Kongsi melalui

Look up operator information for a phone number using Azure Communication Services

Prerequisites

Prerequisite check

Setting up

Create a new Node.js Application

Install the package

Code examples

Authenticate the client

Look up phone number formatting

Look up operator information for a number

Use operator information

Run the code

Sample code

Prerequisites

Prerequisite check

Setting up

Create a new C# application

Connect to dev package feed

Install the package

Code examples

Authenticate the client

Look up phone number formatting

Look up operator information for a number

Use operator information

Run the code

Sample code

Prerequisites

Prerequisite check

Setting up

Create a new Java application

Connect to dev package feed

Install the package

Code examples

Set up the app framework

Authenticate the client

Look up phone number formatting

Look up operator information for a number

Use operator information

Run the code

Sample code

Prerequisites

Prerequisite check

Setting up

Create a new Python application

Install the package

Code examples

Authenticate the client

Look up phone number formatting

Look up operator information for a number

Use operator information

Run the code

Sample code

Troubleshooting

Next steps

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