Updated : December 1, 2025Calling 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 virtual 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.
- Toll-free numbers may not work when calling from outside the United States or they may incur charges. So, check with your provider first before dialing these special numbers.
Components of US Phone Number Format
Before you dial or save a number, a format helps you know what goes into it. Every part has a role. And once you get it, reading numbers becomes much easier.
Standard Format: +1 (Area Code) XXX-XXXX
Example: +1 (415) 234-5678
This is the most widely used American phone number format. And it helps you keep every phone number in USA clean and readable.
1. Country Code
The country code for the United States is +1. This makes it a +1 phone number when you add it before the rest of the digits. You use it while calling from outside the country, and it basically tells the network where the call needs to go. Without it, international calls may not connect. For a valid US phone number, this code is essential.
2. Area Code
An area code shows the location of the phone number. This number consists of three digits. Big cities can have multiple area codes, whereas smaller regions may share only one. Area code is a key part of the proper phone number format used in the US.
3. US Prefix
So after the area code, the next three digits are the prefix. It is also known as the exchange code. It helps route the call to the correct network path. But not all prefixes are allowed for public use. In fact, some are reserved for services or internal systems.
4. Contact Number
Last, you dial the contact number of the person you are calling. This part is unique to the user. It helps you identify the exact person or business you want to reach. Without it, the call cannot be completed properly.
Together, all these parts create a complete US phone number.
Local
Toll-free
Mobile
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 Name | Area Code |
|---|---|
| Connecticut | 203, 860, 475, 959 |
| Maine | 207 |
| Massachusetts | 339, 351, 413, 617, 508, 774, 781, 857, 978 |
| New Hampshire | 603 |
| New Jersey | 201, 551, 609, 640, 732, 848, 856, 862, 908, 973 |
| New York | 212, 315, 332, 347, 516, 518, 585, 607, 631, 646, 680, 716, 718, 838, 845, 914, 917, 929, 934 |
| Rhode Island | 401 |
| Pennsylvania | 215, 223, 267, 272, 412, 484, 610, 717, 724, 814, 878 |
| Vermont | 802 |
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.
| State | Area Codes |
|---|---|
| Illinois | 217, 224, 309, 312, 331, 630, 618, 708, 773, 779, 815, 847, 872 |
| Indiana | 219, 260, 317, 765, 574, 812, 930 |
| Iowa | 319, 515, 563, 641, 712 |
| Kansas | 316, 620, 785, 913 |
| Michigan | 231, 248, 269, 313, 586, 517, 616, 734, 810, 906, 947, 989, 679 |
| Minnesota | 218, 320, 507, 612, 651, 763, 952 |
| Missouri | 314, 417, 573, 636, 660, 816 |
| Nebraska | 308, 402, 531 |
| North Dakota | 701 |
| Ohio | 216, 234, 326, 330, 380, 419, 440, 513, 567, 614, 740, 937, 220 |
| South Dakota | 605 |
| Wisconsin | 262, 414, 608, 534, 715, 920, 274 |
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.
| State | Area Codes |
|---|---|
| Alabama | 205, 251, 256, 334, 938 |
| Arkansas | 479, 501, 870 |
| Florida | 239, 305, 321, 352, 386, 407, 686, 561, 727, 754, 772, 786, 813, 850, 863, 904, 941,954 |
| Georgia | 229, 404, 470, 478, 678, 706, 762, 770, 912 |
| Kentucky | 270, 364, 606, 502, 859 |
| Louisiana | 225, 318, 337, 504, 985 |
| Maryland | 240, 301, 410, 443, 667 |
| Mississippi | 228, 601, 662, 769 |
| North Carolina | 252, 336, 704, 743, 828, 910, 919, 980, 984 |
| Oklahoma | 405, 580, 918, 539 |
| South Carolina | 803, 843, 854, 864 |
| Tennessee | 423, 615, 629, 731, 865, 901, 931 |
| Texas | 210, 214, 254, 325, 281, 346, 361, 409, 430, 432, 469, 512, 682, 713, 726, 737, 806, 817, 830, 832, 903, 915, 936, 940, 956, 972, 979 |
| Virginia | 276, 434, 540, 571, 703, 757, 804 |
| West Virginia | 304, 681 |
Area codes in Western USA
Western USA has 13 states, for which you can find all area codes below.
| State | Area Codes |
|---|---|
| Alaska | 907 |
| Arizona | 479, 501, 870 |
| California | 209, 213, 279, 310, 323, 341, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 628, 650, 657, 661, 669, 707, 714, 747, 760, 805, 818, 820, 831, 858, 909, 916, 925, 949, 951 |
| Colorado | 303, 719, 720, 970 |
| Hawaii | 808 |
| Idaho | 208, 986 |
| Montana | 406 |
| Nevada | 702, 725, 775 |
| New Mexico | 505, 575 |
| Oregon | 503, 541, 971, 458 |
| Utah | 435, 801, 385 |
| Washington | 206, 253, 360, 425, 509, 564 |
| Wyoming | 307 |
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
What Is the US Phone Number Format for Local Calls?
Calling nearby? Here’s how to get the American phone number format right the first time.
Step 1: Identify the three-digit area code of the region you are calling.
Step 2: Next, dial the 7 digit phone number. This would include the exchange code and the subscriber number.
Step 3: Double-check that you have entered all digits correctly to avoid connection issues, and then press call.
In some regions where 10 digit dialing is in place, start with the digit 1 before the area code. You can get more information about the 10 digit dialing on the page of the Federal Communications Commission.
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.
5. How many digits does an American phone number have?
A valid US phone number has 10 digits in total. It includes a three-digit area code and a seven-digit local number. And when you add the country code, it becomes 11 digits.
Local format: (212) 555-7890
International format: +1 212 555 7890
6. How can I know my country’s exit code for dialing to the US?
Your country’s exit code depends on where you are calling from.
For example, India uses 00 and the UK uses 00.
To find yours, check your phone carrier website or your telecom help page.
You can also search: “exit code for international calls from my country”.
Once you get it, follow this pattern:
Exit code + 1 + Area code + Local number
Published : November 25, 2025
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.
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