United States Calling Code: +1
Complete guide to calling United States — international dialing code, step-by-step instructions, and FAQ.
How to Call United States from Abroad
📞 Step-by-Step Dialing Guide
- Dial your country's exit code (e.g. 011 from US, 00 from most countries, + from mobile)
- Dial +1 — the country calling code for United States
- Dial the local phone number (area code + subscriber number)
About United States Calling Code
United States's international dialing code is +1. This code is assigned by the International Telecommunication Union (ITU) and must be dialed before the local phone number when calling United States from another country. United States is located in North America.
Country calling codes (also known as ISD codes or dialing codes) are telephone numbering plan prefixes defined by ITU-T standards E.123 and E.164. Each country is assigned one or more unique prefixes to facilitate international direct dialing.
Frequently Asked Questions
What is the calling code for United States?
The international calling code for United States is +1.
How do I call United States from the United States?
Dial 011 (US exit code) + +1 + local phone number.
How do I call United States from the United Kingdom?
Dial 00 (UK exit code) + +1 + local phone number.
Can I use the + symbol instead of the exit code?
Yes! On mobile phones you can dial ++1 directly followed by the local number. The + symbol automatically replaces your country's exit code.
How do I call within United States?
If you're already in United States, simply dial the local number directly. You do not need to use the country code +1 for domestic calls.
United States Mobile Phone Prefixes
Mobile phone numbers in United States typically use the following prefixes:
- Most US mobile numbers share area codes with landlines
- No dedicated mobile prefix in NANP
United States City / Area Codes
Major cities in United States and their local area codes (dial these after the country code +1 when calling from abroad):
| City | Area Code(s) |
|---|---|
| New York City | 212, 332, 347, 646, 718, 917, 929 |
| Los Angeles | 213, 310, 323, 424, 747, 818 |
| Chicago | 312, 464, 708, 773, 847, 872 |
| Houston | 281, 346, 713, 832 |
| Miami | 305, 645, 786 |
| San Francisco | 415, 628 |
| Washington DC | 202, 771 |
| Boston | 617, 781, 857 |
| Dallas | 214, 469, 682, 817, 940, 972 |
| Seattle | 206, 253, 425, 564 |
Note: Drop any leading "0" when dialing from abroad. Example: London 020 becomes +44 20 + local number.
Other Countries in North America
Nearby countries and their calling codes: