Country calling code

United States country code: +1

Q: What is the exit code for international calls from United States?

To call another country from United States, dial 011, then the other country's code and number. On mobile phones you can always use + instead.

To call United States from another country, dial your exit code, then 1, then the national number without the leading 1. A United States mobile number dialled from abroad looks like +1 201-555-0123.

Country code: +1
Exit code (IDD): 011
Trunk prefix: 1
Mobile number length: 10 digits
ISO country code: US
Time zone: 8 time zones, UTC−10 to UTC−5 (UTC−4 in summer)
Capital: Washington
Currency: USD

How to call United States

1
Dial the exit code of the country you are in. 011 in the US and Canada, 00 in the UK and most of Europe, 0011 in Australia. On a mobile phone, press and hold 0 to type + instead.
2
Dial 1, the country code of United States.
3
Dial the local number without the leading 1. Numbers written for callers inside United States start with the trunk prefix 1; it is dropped when you call from abroad.

Calling from	You dial
Inside United States	(201) 555-0123
Any mobile phone	+1 201-555-0123
UK, Germany, India and most countries	00 1 201-555-0123
Australia	0011 1 201-555-0123
Japan	010 1 201-555-0123

Example with the United States sample number +12015550123.

Calling abroad from United States

Dial the exit code 011, then the country code and the number. To call the US from United States: 011 1 + area code + number.

United States phone number format

Example numbers for each number type, written the way they are dialled inside United States and from abroad. The length counts the digits after the country code.

Type	National format	International format	E.164	Digits
Mobile	(201) 555-0123	+1 201-555-0123	+12015550123	10
Landline	(201) 555-0123	+1 201-555-0123	+12015550123	10
Toll-free	(800) 234-5678	+1 800-234-5678	+18002345678	10
Premium rate	(900) 234-5678	+1 900-234-5678	+19002345678	10
Personal number	(500) 234-5678	+1 500-234-5678	+15002345678	10

Mobile networks in United States

The first digits of a number show which network the number range was assigned to. Numbers can be ported to another network later.

All 15 prefixes →

Onvoy

12 prefixes

165920016592221659300165940016594441659500165960016596661659777165980016599001659999

Fractel

3 prefixes

165952916597661659888

Country codes of United States's neighbours

🇨🇦 Canada+1 🇨🇺 Cuba+53 🇲🇽 Mexico+52

United States country code: FAQ

What is the country code of United States?

The country calling code of United States is +1. United States shares the code +1 with other territories.

How do I call United States from abroad?

Dial your exit code (011 from the US and Canada, 00 from most of Europe, or simply + on a mobile phone), then 1, then the local number without the leading 1. Example: +1 201-555-0123.

What is the exit code for international calls from United States?

To call another country from United States, dial 011, then the other country's code and number. On mobile phones you can always use + instead.

How many digits does a United States mobile number have?

Mobile numbers in United States have 10 digits after the country code (without the trunk prefix), for example +1 201-555-0123.

Which mobile networks operate in United States?

Mobile number ranges in United States are assigned to Onvoy, Fractel and others. Because numbers can be ported between networks, the prefix shows the network a number was originally issued to. Use the carrier lookup to check a specific number.

How can I check if a United States phone number is valid?

Enter the number in the checker on this page. It checks the length and number ranges of United States offline. To verify numbers in bulk or from your own software, use the numlookupapi phone validation API.

Phone number API

Validate numbers like this in your app

numlookupapi checks any phone number worldwide in one request and returns validity, line type, carrier, location and every standard format as JSON.

Read the documentation

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GET https://api.numlookupapi.com/v1/validate/+12015550123

{
  "valid": true,
  "international_format": "+12015550123",
  "country_prefix": "+1",
  "country_code": "US",
  "line_type": "mobile",
  "carrier": "…",
  "e164_format": "+12015550123",
  "national_format": "(201) 555-0123"
}