North America · US
United States country code: +1
- Exit code from United States: 011
- Time zone: ET (UTC−5/−4)
Reviewed by Sujan ThapaliyaLast updated
What is the country code for United States?
The country code for United States is +1. To call the United States from the United States, dial 011 1 followed by the local number exactly as written. From a mobile, dial +1 directly. A United States number in full international format looks like +1 (212) 555-0187.
United States at a glance
- Country calling code
- +1
- ISO country code
- US
- Exit code (dialling out of United States)
- 011
- The prefix people in this country dial to reach another country.
- National trunk prefix
- None
- Nothing to remove: the local number is the international number.
- Number length
- 10 digits: a 3-digit area code plus a 7-digit subscriber number
- Time zone
- ET (UTC−5/−4)
Dialing
How to call the United States: step by step
The full sequence is: exit code + 1 + local number.
- 1
Dial your exit code
From the United States and Canada that is 011. From most of Europe, Asia, and Africa it is 00. On any mobile you can simply press and hold 0 to get a + instead, which works from anywhere. - 2
Dial 1
1 is the country calling code for the United States. It never changes and it is the same from every country in the world. - 3
Dial the number exactly as written
United States has no national trunk prefix, so the number you would dial locally is the same number you dial after +1. Nothing to strip. - 4
Check the time first
United States is on ET (UTC−5/−4). Business calls placed outside local working hours are the most common reason an international call goes unanswered.
Worth knowing
US mobile and landline numbers are indistinguishable by prefix; you cannot tell them apart without a carrier lookup.
Number format
What a United States phone number looks like
555-0100 through 555-0199 are reserved for fictional use, so these examples never reach a real subscriber.
| Type | Format | Example |
|---|---|---|
| Landline | +1 (NPA) NXX-XXXX | +1 (415) 555-0123 |
| Mobile | +1 (NPA) NXX-XXXX (same format as landline) | +1 (212) 555-0187 |
City codes
United States area and city codes
Dial these exactly as shown after the country code.
| City / region | Code | Dial from abroad |
|---|---|---|
| New York | 212 | +1 212 |
| Los Angeles | 213 | +1 213 |
| Chicago | 312 | +1 312 |
| Houston | 713 | +1 713 |
| Miami | 305 | +1 305 |
| San Francisco | 415 | +1 415 |
Frequently asked questions
What is the country code for United States?
The country code for United States is +1. Written in full international (E.164) format, a United States number looks like +1 (212) 555-0187.
How do I call the United States from the United States?
Dial 011, then 1, then the local number exactly as written. From a mobile you can dial +1 directly instead of 011.
How many digits is a United States phone number?
10 digits: a 3-digit area code plus a 7-digit subscriber number. Written internationally it becomes +1 followed by that national number.
Which other countries use +1?
+1 is shared with Canada, Dominican Republic, Jamaica, Bahamas, Bermuda, Trinidad and Tobago, Puerto Rico. The country is identified by the digits that follow the country code, not by the code alone.
What time is it in United States?
United States is on ET (UTC−5/−4). Check the local time before calling; the safe business window is roughly 9am to 5pm local.
Sources
- ITU-T Recommendation E.164 — The international public telecommunication numbering plan — International Telecommunication UnionThe international number format, the 15-digit maximum, and how country codes and national numbers compose.
- ITU-T International Numbering Resources — International Telecommunication UnionThe assignment of country calling codes and the published national numbering plans they belong to.
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