us phone number format

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In our globalized world, knowing how to correctly format a US phone number is a vital skill for effective communication. Whether you’re doing business with US partners, keeping in touch with American friends and family, or visiting the United States, understanding the proper format, including the country code and area code, is essential. The US employs a NPA-NXX numbering system, with numerous area codes across the country. Learning to navigate this system will help you avoid missed connections and communicate professionally with your American contacts. This guide provides a concise overview of the US phone number format, ensuring that you can connect with confidence.

How to make a phone call to the USA?

How to make a phone call to the USA?
  1.  Dial the exit code:
    • If you’re calling from a mobile phone, dial the “+” symbol followed by the US country code (1).
    • If you’re calling from a landline, dial your country’s international exit code (e.g., 00, 011) followed by the US country code (1).
  2. Enter the area code:
    • Dial the three-digit area code for the location you’re calling in the USA.
  3. Dial the local number:
    • Enter the seven-digit local phone number.

Here’s a table summarizing the steps:

Step Instructions
1 Dial the exit code: – Mobile: “+” followed by “1” – Landline: International exit code followed by “1”
2 Enter the three-digit US area code
3 Dial the seven-digit local phone number
For example, if you’re calling a mobile phone in New York City (area code 212) from outside the US, you would dial: +1 212 555 1212 If you’re calling from a landline in the United Kingdom (exit code 00) to the same number, you would dial: 00 1 212 555 1212 Remember to account for time zone differences when placing your call, as the United States spans multiple time zones.

Dialing Phone Numbers in the USA

Calling within the United States is a breeze thanks to its standardized 10-digit phone number system. Whether you’re using a landline or mobile phone, connecting with friends, family, or businesses across the country is easy with a few simple steps.

Understanding the 10-Digit System

Every US phone number consists of

  • Area Code (3 digits): This identifies the geographic region where the phone number originates.
  • Local Number (7 digits): This is the unique number that distinguishes a specific phone line within the area code.

How to Dial Within the US

The way you dial depends on whether it’s a local or long-distance call:

  • Local Calls (Same Area Code): Simply dial the 7-digit local number. No need for an area code or the number “1”.
  • Long-Distance Calls (Different Area Code): Dial “1” followed by the area code and local number.
  • Landline to Mobile Phone: Same as long-distance – dial “1” + area code + local number.
  • Mobile to Mobile: Dial the full 10-digit number. (You can usually add “1” before the area code if you prefer, but it’s not required).


Let’s make it practical:

  • Local Call in Chicago (Area Code 312): Dial 555-1212
  • Long-Distance Call from Miami (305) to Chicago (312): Dial 1-312-555-1212
  • Mobile to Mobile (Any Location): Dial 1-415-555-8989 or 415-555-8989 (both work)

10-Digit Dialing Areas

Some regions require 10-digit dialling for all calls, even local ones. This helps avoid confusion when multiple area codes overlap within a geographic area. If you’re unsure, just dial the full 10 digits – it won’t hurt!

Tips for Successful Dialing:

  • Double-check the Number: Ensure you have the correct area code and local number.
  • Listen for a Dial Tone: Before entering the number, wait for a dial tone to ensure you have a connection.
  • Area Code First: For long-distance calls, always dial “1” and the area code before the local number.
  • Mobile Flexibility: When calling from a mobile phone, you usually have the option to include or omit the “1” before the area code.
When making a call within the United States, the process is straightforward. The US uses a 10-digit dialing system, which includes a three-digit area code followed by a seven-digit local number. In some cases, you might need to dial a “1” before the area code, especially if you’re calling from a landline or making a long-distance call.
Scenario Steps to Call
Local call (same area code) Dial the 7-digit local number
Long-distance call (different area code) Dial 1 + Area Code + Local Number
Landline to mobile phone Dial 1 + Area Code + Local Number
Mobile phone to mobile phone Dial the 10-digit number (with or without “1”)

Top 10 Countries for Calling the USA

When calling a US phone number from another country, it’s essential to include the USA country code (+1) after the international exit code. This ensures that your call is correctly routed to the United States. This table lists the top 10 countries along with their exit codes and the steps to call a US phone number.
Country Exit Code Steps to Call the USA
Canada 011 011 + 1 + Area Code + Local Number
United Kingdom 00 00 + 1 + Area Code + Local Number
Australia 0011 0011 + 1 + Area Code + Local Number
Germany 00 00 + 1 + Area Code + Local Number
France 00 00 + 1 + Area Code + Local Number
Japan 010 010 + 1 + Area Code + Local Number
China 00 00 + 1 + Area Code + Local Number
India 00 00 + 1 + Area Code + Local Number
Mexico 00 00 + 1 + Area Code + Local Number
Brazil 00 00 + 1 + Area Code + Local Number
To call a US phone number from these countries, follow these steps:
  1. Dial your country’s exit code.
  2. Dial the US country code (1).
  3. Enter the three-digit area code for the location you’re calling.
  4. Dial the seven-digit local phone number.
For example, if you’re calling a phone number in Los Angeles (area code 310) from Australia, you would dial: 0011 1 310 555 1212 By familiarizing yourself with the proper exit codes and dialing procedures, you can easily connect with friends, family, and business contacts in the United States from these top 10 countries.

Important Considerations When Calling the USA

When making a phone call to the USA, there are several important factors to keep in mind to ensure a successful connection. Here’s a table outlining the key considerations:
Factor Description
Complete Phone Number Make sure you have the complete and accurate phone number, including the area code and the 7-digit local number. Double-check the number to avoid dialing incorrect digits.
Area Code Ensure that you have the correct 3-digit area code for the specific geographic region you are calling. Area codes are essential for routing your call to the right location within the United States.
7-Digit Local Number The local number should consist of 7 digits. Make sure you have the complete local number to reach the specific phone line you are trying to contact.
US Country Code Remember to include the US country code (+1) when dialing from outside the United States. This code is necessary to establish an international connection to the US telephone network.
International Exit Code If you are calling from a country other than the United States, you need to dial the appropriate international exit code before the US country code. The exit code allows you to access international telephone networks from your location.
Time Zones The United States spans multiple time zones, so consider the time difference between your location and the area you are calling. Be mindful of the appropriate times to call to avoid inconveniencing the person you are trying to reach.
Dialing Format Familiarize yourself with the correct dialing format: [Exit Code] + [US Country Code] + [Area Code] + [Local Number]. Following this format ensures that your call is routed correctly.
Cellular vs. Landline Keep in mind that some area codes may be specific to cellular phones or landlines. Make sure you have the appropriate area code for the type of phone you are trying to reach.
Special Characters When dialing from a mobile phone, you may need to use the “+” symbol before the US country code instead of the exit code. Some phones allow you to replace the exit code with a “+”. Check your phone’s instructions for international dialing.
Confirmation of Connection After dialing the complete number, wait for the call to connect. You may hear a series of clicks, tones, or a ringing sound before the call is answered. If you encounter any issues or hear an error message, double-check the number and the dialing format.
By keeping these important factors in mind and following the appropriate dialing format, you can ensure a smooth and successful phone call to the United States.

Area Codes in the United States

The United States is divided into various regions, each with its own set of area codes. These three-digit codes are an essential part of the US phone number format, allowing for efficient call routing and identification of the geographical location of the caller. Some states have just one or two area codes, while others have multiple codes to accommodate their population and communication needs.

Area Codes by Region

Below is a table of the area codes in the United States, categorized by region: Northeast USA Region

Northeast Region

State Area Codes
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
Midwest USA Region

Midwest Region

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
Southern USA region

Southern Region

State Area Codes
Alabama 205, 251, 256, 334, 938
Arkansas 479, 501, 870
Delaware 302
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
Western USA Region

Western Region

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
When making a call within the United States, it’s essential to know the area code of the person or business you are trying to reach. By familiarizing yourself with the area codes in each region, you can easily navigate the US phone system and ensure that your calls are connected successfully.  How to Get a US phone number for your business?

Avoid Confusion with Caribbean Countries and Canada

Avoid Confusion with Caribbean Countries and Canada When making calls to the United States, it’s crucial to be aware that some Caribbean countries and Canada also use the +1 country code and 7-digit local numbers. This similarity in numbering format can lead to confusion and potentially costly mistakes if you’re not careful.

Caribbean Countries with +1 Country Code

Several Caribbean countries and territories share the same +1 country code as the United States. When you receive a call from one of these locations, it may appear as a domestic call due to the familiar format. However, it’s essential to recognize that these are international calls and can result in significant charges if you mistakenly dial them back without using the proper international dialing format. Here’s a table of some Caribbean countries and their area codes:
Country/Territory Area Code(s)
Anguilla 264
Antigua and Barbuda 268
Bahamas 242
Barbados 246
Bermuda 441
British Virgin Islands 284
Cayman Islands 345
Dominica 767
Dominican Republic 809, 829, 849
Grenada 473
Jamaica 876
Montserrat 664
Sint Maarten 721
Trinidad and Tobago 868
Turks and Caicos Islands 649
U.S. Virgin Islands 340

Canada’s Numbering Format

Canada also shares the same +1 country code and 7-digit local number format as the United States. When calling Canada from the United States, you don’t need to dial the +1 country code, but you still need to include the area code. However, when calling Canada from other countries, you must use the international dialing format, including the exit code, +1 country code, area code, and local number.

How to Avoid Confusion and Costly Mistakes

To prevent accidentally making international calls to Caribbean countries or Canada when intending to call within the United States, follow these tips:
  1. Carefully check the area code before dialing. If you’re unsure whether an area code belongs to the United States, research it online or consult a reliable area code directory.
  2. When receiving calls from unfamiliar numbers, especially those with area codes you don’t recognize, avoid calling back immediately. Research the area code first to determine if it belongs to a Caribbean country or Canada.
  3. If you need to make international calls to Caribbean countries or Canada, make sure to use the proper international dialing format, including the exit code, +1 country code, area code, and local number. Consult with your telephone service provider about international calling rates to understand the potential costs.
By being aware of the shared +1 country code and 7-digit numbering format used by some Caribbean countries and Canada, you can avoid confusion and costly mistakes when making calls to the United States.

Other Common Mistakes and Troubleshooting

Common Mistakes in US Phone Number Formatting

When formatting US phone numbers, people often make common mistakes that can lead to communication issues. It is important to be aware of these mistakes to ensure accurate and effective phone number formatting.
  • Missing or incorrect country code: Many people forget to include the country code (+1) when dialing a US phone number from another country. This can result in calls not going through or connecting to the wrong destination.
  • Omitting the area code: Area codes are essential for identifying the specific region of a US phone number. Not including the area code can lead to misdirected calls or confusion about the intended recipient.
  • Incorrect placement of hyphens or parentheses: Some individuals may incorrectly place hyphens or parentheses within the phone number, causing errors when dialing or entering the number into a system.
  • Using invalid characters: Phone numbers should only consist of numeric digits (0-9). Using special characters or letters can result in incorrect dialing or system errors.
  • Entering additional digits: Occasionally, individuals may unknowingly input extra digits, resulting in failed or misrouted calls. It is crucial to double-check the number for accuracy before dialing.

Troubleshooting US Phone Number Issues

If you encounter issues with a US phone number, the following troubleshooting tips can help resolve the problem:
  1. Verify the correct formatting: Ensure that you have the correct country code, area code, and local number. Double-check for any missing or extra digits and ensure proper placement of hyphens or parentheses.
  2. Confirm the phone number’s validity: If you are unsure about the accuracy of a US phone number, try verifying it online through reliable phone directory services or contacting the intended recipient directly.
  3. Check for any temporary network issues. In some cases, communication problems can be caused by temporary network issues. Wait for a few minutes and try dialing the number again.
  4. Test with a different phone or service provider: If the issue persists, try using a different phone or service provider to determine if the problem lies with your device or network connection.
  5. Contact your service provider for assistance. If you are still unable to connect or encounter persistent issues, reach out to your service provider for further assistance and troubleshooting.
By being aware of common mistakes in US phone number formatting and utilizing troubleshooting techniques, you can ensure seamless communication when dialing US phone numbers.


Mastering the US phone number format is crucial for seamless communication, whether you’re calling within the country or reaching out to international contacts. Remember, a standard US number consists of three parts: the country code (+1), the three-digit area code, and the seven-digit local number.

When dialing from abroad, be sure to use the appropriate international exit code followed by the +1 country code. Keep in mind that some Caribbean countries and Canada share the same +1 code, so double-check the specific area code to avoid confusion and unexpected charges. Want to dive deeper into international dialling? Explore our comprehensive guide for detailed instructions and expert tips.


The complete US phone number format consists of the exit code, the US country code (+1), the area code, and the 7-digit local number. Here’s a breakdown of each component:
Component Description Example
Exit Code The code dialed to initiate an international call from your country (varies by location) 011 (Canada)
US Country Code The code that identifies the United States as the destination country +1
Area Code A 3-digit code representing a specific geographic region within the United States 718 (NYC)
7-Digit Local Number A unique combination of digits identifying the individual phone line you are calling 222 2222
To dial a US phone number, follow these steps:
  1. Determine the exit code for your country.
  2. Dial the exit code.
  3. Enter the US country code (+1).
  4. Dial the 3-digit area code for the specific region you are calling.
  5. Enter the 7-digit local number.
Yes, here’s an example of calling the British Embassy in Washington, DC from the United Kingdom. The local number for the embassy is (202) 588-5500.
Component Value
Exit Code 00
US Country Code 1
Area Code 202
Local Number 588-5500
Therefore, the complete number you would dial is: **00-1-202-588-5500** Remember to replace the example values with the specific exit code, area code, and local number you intend to call.
The international exit code is a specific numeric prefix that you need to dial before entering the country code of the destination country. It is essential because it enables your phone to recognize that you are making an international call and ensures that the call is routed correctly. By including the international exit code, you signal