US Phone Number Format with Country Code [Example Included]

Senior Writer: Jainy Patel

Updated : August 11, 2025

Calling someone in the US can be simple only when you know the right US prefix phone number. There are more than 300 area codes spanning across the United States, so you should know which one to pick before dialing any US number.
Continue reading to learn about the US phone number country code format and make a call to any part of the country.

How to Call a USA Phone Number Using Your Phone?

Just like other countries, US phone number country code has a different format. So, when you’re calling anyone in the US, you need to be aware of the area code as well.

Follow the steps below to learn how to write a US phone number :

• Enter the country code of the US, which is +1
• Then dial the 3-digit area code where you’re making the call
• Lastly, enter the 7-digit local us phone number to make the call

For example, if you’re calling a lead  in New York City, the phone number format will be: +1 718 222 2222

• +1 stands for US country code 
• 718 is the area code for New York 
• Rest of the digits are local phone numbers to whom you’re trying to call 

Toll-Free US Phone Number Format Example

Below, I have explained how you can dial a toll-free number in the US.

• Enter US country code, 1.
• Toll-free prefix for the US is 800.
• Then enter the given local number xxx xxxx.

How Many Area Codes are There in the United States?

The United States is divided into different regions for which various dialing codes are assigned. Some states have one to two area codes, while others have more than 10 area codes. Below, I have listed all the US area codes so you can find the right one.

Area codes in Northeast USA

There are a total of 9 states in the northeast region of the United States. Below I have created a table and bifurcated area codes based on each state in the northeast USA.

Area codes in Midwest USA

The Midwest USA includes 12 states in which you can make phone calls. You can find below all the area codes assigned based on their respective states.

Area codes in Southern USA

Southern USA has 16 states, the highest among all. This also reflects bigger business opportunities if you’re targeting this area. Check out all the area codes associated with the southern USA below.

Area codes in Western USA

Western USA has 13 states, for which you can find all area codes below.

United States Phone Number Example

Still wondering what are the special calling codes for the United States? Or how to write US phone numbers using its country code? Let’s understand it with a different example.

In the United States, country code phone number formats include three-digit area code followed by seven-digit USA local phone number.

Here’s a simple example that will help you add US country code to a phone number.

• Area code – Phone number or 203 – 688-5500

For instance, if you want to contact the US embassy from the UK, you can follow simple steps below :

• Exit code – 00 (+)
• US country code – 1
• 202 – local DC area code
• 647 4000 – embassy number

So, you have to dial: 00-1-202-647-4000

Quick Phone Number Generator

US numbers CA numbers Toll-free

Search

< Back

Start your CallHippo free trial and claim
for your business

Select this number or browse other available options during sign-up!

Try for free

Why Is My Call to the US Not Working?

If you’re trying to call the US and still not able to go through, you might have missed out on some steps or entered the wrong phone number format. Quickly take a look at below points and verify your calling number is properly formatted.

• You didn’t enter the USA exit code and instead directly dialed the number.
• You dialed the incorrect area code by mistake.
• You haven’t verified if the number you’re calling accepts international calls.
• You missed out on dialing plus sign (+1) before entering the landline or mobile phone number.

Above are some of the common mistakes people make when dialing international numbers. So, ensure you keep a check of every aspect to avoid entering the wrong format.

Frequently Asked Questions

1. What is the cheapest way to call the UK from the USA?

The best and most affordable way to call the UK from USA is to select a VoIP provider like CallHippo. It offers affordable and low cost international calling rates which can help you connect with UK customers and scale your business.

2. Does the UK number work in the US?

While UK phone numbers might not work in the US, you can get virtual phone number from CallHippo to make calls in different countries. This cloud-based solution can help you connect with your customers without having any physical calling setup.

3. Do I need to include the country code when calling the UK from the US?

Yes, you need to include +44 before entering the UK phone number when making a call from the US to the UK. if you want to get US or UK virtual numbers, you can try out CallHippo and get access to different features for international calling.

4. What is the time difference between UK and US?

The time difference between the UK and US is between 4 to 8 hours, whereas the US is behind the UK. For example, it’s 10 AM in New York when it’s 3 PM in London.

Published : July 30, 2025

Jainy Patel

Jainy Patel is a content strategist having 8+ years of industry experience. Her expertise lies in developing marketing and content strategies for different VoIP solutions. Jainy is committed to helping companies streamline their communication and improve customer engagement with personalized & targeted content.

Let’s Stay in Touch

Subscribe to our newsletter & never miss our latest news and promotions.

Email Address*

+24K people have already subscribed