The +1 prefix belongs to United States. If you got a call or text from a number starting with +1 (calling code 1), it came from United States.
Code
+1
ISO
US
Region
Americas
Time zone
America/New York
The +1 code identifies United States on the international telephone network. Any phone number that begins with +1 — written +1 or 001 — is a United States number.
Every United States number in international format follows this shape — colour-coded so you can see where the country code ends and the local number begins.
When dialing United States from abroad, the only fixed part is +1 — that's the country code. The rest depends on whether you're calling a mobile or landline number inside United States.
+X XXX XXX XXXX
Example: +1 201 555 0123
+1 XX XXXX XXX
Include the area code if applicable. Omit any leading 0.
Enter the country code +1 when dialing United States from abroad.
Add the local phone number without the leading zero.
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Example numbers for United States:
Dialing codes immediately above and below +1 in the ITU plan — handy if you mistyped a digit or are dialing across a region.
Everything you need to know about TwinPhone.
The +1 code belongs to United States. Any phone number that starts with +1 — or with 001 — is a United States number.
The 001 prefix is United States. The 00 is the international exit code dialed from Europe and many other regions; it is followed by +1, the United States country code.
The country code (international dialing code) for United States is +1. To call United States from abroad, dial +1 followed by the national number without its leading zero.
+1 is United States's international country calling code under the ITU E.164 plan — often searched as the "1 area code". Any phone number starting with +1 is a United States number.
From TwinPhone, just type +1 and the number — we connect it. From a landline, dial your exit code, then +1, then the number without the leading 0.
United States's current local time is shown live on this page. Check it before calling so you reach people during waking hours.
Yes! Virtual numbers in United States start at $1.95/month. Use it as your caller ID so people see a local number, or receive incoming calls directly in your browser.
No. TwinPhone works directly in your browser — Chrome, Edge, Safari, or Brave. Open the site, add credit, dial +1 and your number, done. No installs, no plugins, no SIM card required.
Cheap calls to United States
Per-minute rates to United States straight from your browser — no SIM, no app.
Where is this number from?
Paste an international number (with +) and we'll tell you which country it's from, its dialing code, and how to call.
All phone dialing codes
The complete list of country codes and international dialing prefixes.
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