Country code
United States: +1
United States uses country code +1. A number is written +1 201 555 0123.
How to call United States
The table uses the example number below. Replace it with the number you are calling. Drop the 1 at the start of the national number when you dial from abroad.
| Calling from | Exit code | Dial |
|---|---|---|
| Any mobile phone | None | +1 201 555 0123 |
| United States | None | (201) 555-0123 |
| Canada | None | 1 (201) 555-0123 |
| United Kingdom | 00 | 00 1 201 555 0123 |
| Australia | 0011 | 0011 1 201 555 0123 |
| Germany | 00 | 00 1 201 555 0123 |
| France | 00 | 00 1 201 555 0123 |
| India | 00 | 00 1 201 555 0123 |
| Japan | 010 | 010 1 201 555 0123 |
| Mexico | 00 | 00 1 201 555 0123 |
| South Africa | 00 | 00 1 201 555 0123 |
How a United States number is built
Digit counts are the national number only, after the country code and without the 1 trunk prefix.
| Line | Digits | Pattern |
|---|---|---|
| Mobile and landline | 10 digits | A pattern of 637 characters, applied by the validator below |
| Toll free | 10 digits | 8(?:00|33|44|55|66|77|88)[2-9]\d{6} |
| Premium rate | 10 digits | 900[2-9]\d{6} |
- Example, national form
- (201) 555-0123
- Example, international form
- +1 201 555 0123
Validate a United States number
Paste a number and the tool checks it against the numbering plan. It returns the standard formats and the line type the plan assigns.
Type the number the way it is written in United States, or start with + and the country code.
Area codes in United States
372 geographic area codes serve United States.
| Area code | Place |
|---|---|
| 201 | New Jersey |
| 202 | District of Columbia |
| 203 | Connecticut |
| 205 | Alabama |
| 206 | Washington |
| 207 | Maine |
| 208 | Idaho |
| 209 | California |
| 210 | Texas |
| 212 | New York |
| 213 | California |
| 214 | Texas |
Show the other 360 rows
372 rows. Geographic area codes in service.
Other places that use +1
- Antigua & Barbuda
- Anguilla
- American Samoa
- Barbados
- Bermuda
- Bahamas
- Canada
- Dominica
- Dominican Republic
- Grenada
- Guam
- Jamaica
- St. Kitts & Nevis
- Cayman Islands
- St. Lucia
- Northern Mariana Islands
- Montserrat
- Puerto Rico
- Sint Maarten
- Turks & Caicos Islands
- Trinidad & Tobago
- St. Vincent & Grenadines
- British Virgin Islands
- U.S. Virgin Islands
Questions about calling United States
- What is the country code for United States?
- The country code for United States is +1. Written in full, a number looks like +1 201 555 0123.
- Do I dial the 1 at the start of a United States number from abroad?
- No. The 1 is the trunk prefix used for calls inside United States ((201) 555-0123). From abroad it is dropped after +1 (+1 201 555 0123).
- How many digits is a United States phone number?
- Mobile and landline numbers have 10 digits after the country code.
- How do I call another country from United States?
- Dial 011, then the country code and the number. On a mobile phone, + replaces 011.
- Which other places use +1?
- Antigua & Barbuda, Anguilla, American Samoa, Barbados, Bermuda, Bahamas, Canada, Dominica, Dominican Republic, Grenada, Guam, Jamaica, St. Kitts & Nevis, Cayman Islands, St. Lucia, Northern Mariana Islands, Montserrat, Puerto Rico, Sint Maarten, Turks & Caicos Islands, Trinidad & Tobago, St. Vincent & Grenadines, British Virgin Islands and U.S. Virgin Islands also use +1, so the digits after the code are what tell the places apart.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Country Calling Codes | 1 credit per lookup (an unknown code, country or name is free) | API docs |
Number patterns, lengths and examples: libphonenumber-js 1.13.15, released 2026-10-08, read 2026-10-19, built on Google's libphonenumber metadata. Area codes: North American Numbering Plan Administrator NPA report, file dated 10/17/2026. Library. LookValid is not connected to Google or to any phone company named here.