How to Make an International Call: Full Guide

What You Need Before Dialing

Before you call, confirm that international calling is enabled on your phone account. A phone can work normally for domestic calls while international calls remain restricted.

Have the complete destination number ready. You need the country code, the city or area code when one applies, and the local subscriber number. Copy the number from a reliable source, such as the recipient, an official organization page, or a recent contact record.

Also check whether the written number begins with a plus sign or a local trunk prefix, often shown as a zero in parentheses. The plus sign represents the international dialing prefix. A trunk prefix may need to be removed when calling from another country.

Step-by-Step: How to Dial an International Number

For a call placed from the United States, enter the parts in this order:

1. Enter the United States international exit code: 011. On many mobile phones, you can enter a plus sign instead by pressing and holding the zero key.
2. Enter the destination country code.
3. Enter the city or area code, if the destination uses one. Remove a leading zero when the country’s official dialing instructions tell you to do so.
4. Enter the remaining local phone number.
5. Review the full sequence, then press the call button.

For a worked example, suppose you are calling a United Kingdom number written locally as 020 followed by its subscriber number. From the United States, the pattern is 011, then country code 44, then area code 20 without its local leading zero, followed by the subscriber number. On a mobile phone, the same pattern can begin with +44.

Do not add spaces, brackets, or dashes if your dialer rejects them. Those marks only make a number easier to read. The digits and their order are what matter.

Finding the Right Country and Area Code

Look up the country code through the official telecommunications regulator for the destination country or a recognized international numbering directory. You can also check the contact page of the organization or person you are calling. A number displayed with a plus sign normally places the country code immediately after that sign.

Country codes identify countries or numbering regions. Area codes identify a city, region, or type of service within that system. They come after the country code and before the subscriber number.

Pay close attention to a zero shown before the area code. In many countries, that zero is used only for calls made inside the country. Official dialing instructions will say whether to remove it for an international call. Do not remove digits based only on guesswork, because numbering rules vary.

Turning On International Calling in Your Account

Sign in through the provider’s official website. Open the account dashboard and select the mobile line you are using. Look under sections commonly labeled Calling Features, International Services, Line Settings, or Restrictions.

Find the international calling control and confirm that it shows as active for the correct line. If you changed the setting, save the change and wait for the account page to confirm it. Restarting the phone or briefly turning airplane mode on and off may help the device reconnect after an account setting changes.

If no international option appears, check the official support section for instructions tied to your account type. Do not assume that a setting on one line applies to every line on the account.

Why an International Call Might Not Go Through

If the call fails, check the number before repeatedly dialing. Common causes include:

• The exit code or plus sign is missing.
• The country code is incorrect or was entered twice.
• A domestic leading zero was left before the area code.
• The international calling feature is not active on that specific line.
• The account has a calling restriction or security block.
• The destination country, region, or number type is blocked by the provider.
• The recipient’s number is disconnected, unavailable, or unable to accept international calls.

Try saving the number in international format with a plus sign, country code, area code, and subscriber number. Then place the call from the saved contact. If one destination fails but another international number works, the problem is more likely connected to the destination or its number format.

Getting Help From Support

Go to the provider’s official website and open the page usually labeled Contact Us, Support, or Help Center. Choose the topic for calling, account features, or international service. Use the contact method shown there so you reach the correct support team.

Have your account details, mobile line, destination country, and exact error message ready. Tell the representative whether domestic calls work, whether international calling appears active, and whether you tried both the exit-code format and the plus-sign format.

Ask support to check for an international calling restriction, a destination block, or a pending account-setting change. Avoid posting the full destination number in a public support forum.

Quick Answers

How do I make an international call from the United States? Enter 011 or a plus sign, then the country code, area code when required, and local subscriber number.

How to make an international phone call on a mobile phone? Press and hold zero to enter a plus sign when your dialer supports it. Add the country code and the rest of the number in international format.

Why does the call fail immediately? Check for a missing exit code, an incorrect country code, an extra leading zero, or an account restriction.

What is the simplest way to remember how to make an international call? Use this order: exit code or plus sign, country code, area code, then subscriber number.