US
United States Phone Number Format
Country code +1 — Complete guide to United States phone number formats, mobile and landline structures, and area codes.
How United States Phone Numbers Are Written
Phone numbers in the United States have 10 digits after the country code +1.
The country is part of the North American Numbering Plan: a 3-digit area code and a 7-digit number, written
(201) XXX-XXXX. From the US, dial 1 + the 10 digits, with no 011.
| Country code | +1 |
|---|---|
| Digits after +1 | 10 digits |
| Trunk prefix (domestic calls) | 1, for long-distance calls |
| Mobile numbers start with | Same digits as landlines |
| Exit code (to call abroad from the United States) | 011 |
| Dial from the US | 1 201-XXX-XXXX |
Mobile vs. Landline Numbers
10 digits after +1.
(201) XXX-XXXX at home+1 201-XXX-XXXX international10 digits after +1. Landlines begin with an area code, for example New Jersey:
(201) XXX-XXXX at home+1 201-XXX-XXXX internationalMobile and landline numbers share the same area codes and exchanges, so you can’t tell them apart from the number alone.
United States Number Types
| Type | Starts with | Written at home | International | From the US |
|---|---|---|---|---|
| Mobile | — | (201) XXX-XXXX |
+1 201-XXX-XXXX |
1 201-XXX-XXXX |
| Landline | — | (201) XXX-XXXX |
+1 201-XXX-XXXX |
1 201-XXX-XXXX |
| Toll-free | — | (800) XXX-XXXX |
+1 800-XXX-XXXX |
1 800-XXX-XXXX |
| Premium rate | — | (900) XXX-XXXX |
+1 900-XXX-XXXX |
1 900-XXX-XXXX |
X stands for any digit. Source: libphonenumber metadata (phonenumbers 9.0.40), Google's open numbering data.
Checking a number from United States? The phone number checker tells you if it is valid, mobile or landline, and gives its international format.
United States Area Codes
Major area codes in United States:
| Area Code | City / Region |
|---|---|
325 |
Abilene |
330 |
Akron |
234 |
Akron |
518 |
Albany |
229 |
Albany |
957 |
Albuquerque |
505 |
Albuquerque |
320 |
Alexandria |
730 |
Alton |
618 |
Alton |
657 |
Anaheim |
909 |
Anaheim |
752 |
Anaheim |
714 |
Anaheim |
907 |
Anchorage |
734 |
Ann Arbor |
278 |
Ann Arbor |
703 |
Arlington |
571 |
Arlington |
828 |
Asheville |
606 |
Ashland |
404 |
Atlanta |
770 |
Atlanta |
678 |
Atlanta |
470 |
Atlanta |
609 |
Atlantic City |
762 |
Augusta |
706 |
Augusta |
331 |
Aurora |
737 |
Austin |
512 |
Austin |
667 |
Baltimore |
443 |
Baltimore |
410 |
Baltimore |
225 |
Baton Rouge |
425 |
Bellevue |
360 |
Bellingham |
240 |
Bethesda |
610 |
Bethlehem |
484 |
Bethlehem |
835 |
Bethlehem |
406 |
Billings |
228 |
Biloxi |
659 |
Birmingham |
205 |
Birmingham |
952 |
Bloomington |
208 |
Boise |
857 |
Boston |
617 |
Boston |
802 |
Brattleboro |
Dialing Tips
- No 011 needed: United States shares country code +1 with the US, so dial 1 + area code + number. Check your plan: calls to +1 Caribbean countries are often billed as international.
-
Use the + notation: From a US mobile phone, use
+1instead of1. - Verify the number length: Numbers in the United States have 10 digits after +1. If your call does not connect, check that no digit is missing or doubled.
-
Save contacts in international format: Always store phone numbers with the full
+1prefix so they work from any country.
United States Phone Number FAQ
How many digits does a phone number in the United States have?
Phone numbers in the United States have 10 digits after the country code +1.
Can you tell a mobile number from a landline in the United States?
No. In the North American Numbering Plan, mobile and landline numbers share the same area codes and exchanges, so the number alone doesn't tell you which it is.
How do I write a phone number from the United States in international format?
Start with +1, then the national number. For example, a mobile number written (201) XXX-XXXX at home becomes +1 201-XXX-XXXX. From a US landline, dial 1 201-XXX-XXXX.