USA country code +1 — call USA & get a number.
The United States dials on +1, the anchor of the North American Numbering Plan it shares with Canada and the Caribbean. This guide shows you exactly how to reach any US number from abroad — the three-digit area codes, the mandatory 10-digit format, the toll-free ranges, live time across six zones — plus how a business lands a real US number with MCM.
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USA at a glance
The numbers and facts you need before you dial.
What is the country code for USA?
The country code for the United States is +1. It's the single digit the global phone network reads to route a call into the US — placed right after your own exit code and ahead of the 10-digit number.
Here's the catch most guides skip: +1 is not unique to the United States. It's the calling code for the whole North American Numbering Plan (NANP), so Canada and around twenty Caribbean nations — Jamaica, the Bahamas, the Dominican Republic and more — also answer to +1. What pins a number to the US specifically is the three-digit area code that follows.
+1 was the founding country code of the ITU's E.164 plan, assigned to the NANP decades before codes like the UK's +44 or India's +91 came along. The "+" simply means "insert your local exit code here"; on any mobile, press and hold 0 until it becomes a +.
All four mean the same thing — they connect your call to USA.
How to call USA from anywhere
The pattern is short and consistent — your exit code + 1 + the 3-digit area code + the 7-digit local number. US numbers carry no trunk 0 to drop, so what you see is what you dial.
COUNTRY +1 · AREA 212 · SUBSCRIBER 555 1234 (New York · 7 digits) — the area code is always 3 digits and is required even for mobiles. Format: +1 (NPA) NXX-XXXX.
USA phone number format explained
A complete US number is exactly 10 digits: a 3-digit area code plus a 7-digit local number, written (212) 555-1234. Unlike most of the world, the US has no trunk 0 — you never add or drop a leading zero. And since 2021, 10-digit dialing is mandatory everywhere, even for a call across the street, after the 988 crisis line pushed every region onto the full area code.
Landline
Inside US: area code + number → (212) 555-1234. International: +1 + area code + number → +1 212 555 1234. The same 10-digit shape covers the whole country; there's no separate national or city prefix to add.
Mobile
Inside US: area code + number → (917) 555-1234. International: +1 + area code + number → +1 917 555 1234. US mobiles draw on the very same area-code ranges as landlines — there is no distinct mobile prefix, so you cannot tell a cell from a landline by the number.
USA area codes — major cities
Drop the local leading 0 when calling from abroad.
| City | Region | Area code |
|---|---|---|
| New York City | NY | 212, 646, 332, 917, 718, 347, 929 |
| Los Angeles | CA | 213, 323, 310, 424, 818, 747 |
| Chicago | IL | 312, 773, 872 |
| Houston | TX | 713, 281, 832, 346 |
| Phoenix | AZ | 602, 480, 623 |
| Philadelphia | PA | 215, 267, 445 |
| San Antonio | TX | 210, 726 |
| Dallas | TX | 214, 469, 972, 945 |
| Miami | FL | 305, 786, 645 |
| Atlanta | GA | 404, 470, 678, 770 |
| Washington, D.C. | DC | 202, 771 |
| Boston | MA | 617, 857 |
| San Francisco | CA | 415, 628 |
| Seattle | WA | 206, 564 |
| Toll-free (nationwide) | — | 800, 833, 844, 855, 866, 877, 888 |
USA mobile network prefixes
The prefix after +1 tells you which network issued the SIM — though number portability means it no longer guarantees the operator.
Verizon
Largest network by coverage; numbers drawn from local area-code pools nationwide.
AT&T
Second national carrier; same shared area-code ranges, no distinguishing prefix.
T-Mobile
Third national carrier; absorbed Sprint, strong 5G footprint.
MVNOs (Mint, Cricket, Visible, Google Fi…)
Ride on the big three's networks; portability lets a number move between any of them, so the prefix never proves the operator.
USA time zone
The United States is the rare country where "what time is it there?" has six answers. The lower 48 span four zones — Eastern, Central, Mountain and Pacific — and Alaska and Hawaii add two more. Most of the country observes daylight saving (clocks forward in March, back in November), but Hawaii and most of Arizona do not, so the gap to those two shifts twice a year.
To reach a US business nationwide, aim for late morning Eastern — it's still pre-lunch on the West Coast and catches everyone awake. From Europe, early-to-mid afternoon your time lands on the US East-Coast morning.
Emergency numbers in USA
Free to call from any USA phone, landline or mobile.
Common mistakes when calling USA
Almost every failed international call is a formatting issue, not a network issue.
Assuming +1 means it's American
+1 is shared across the whole NANP, so a +1 number could be Canada, Jamaica or the Dominican Republic. The area code is what pins it to the US — check it before you assume a call is domestic.
Skipping the area code
Every US number needs all 10 digits, mobiles included. Since 2021, 7-digit dialing is dead nationwide; "+1 555 1234" with no area code simply fails.
Adding a trunk 0
The US has no leading zero to drop or add. Dial +1 212…, never +1 0212….
Confusing the "1" trunk with the "+1" country code
Inside the US you dial 1 before a long-distance number; from abroad the +1 is the country code. They look alike but do different jobs — don't stack them as "+1 1…".
Expecting a toll-free 800 to work from overseas
US toll-free numbers (800/833/844/855/866/877/888) usually only connect inside North America; from abroad you need the company's full +1 geographic line.
Tips to reduce the cost of calling USA
Use VoIP or a cloud-calling app
Internet routing carries the call most of the way, so calls into the US cost a fraction of carrier international rates.
Get a US virtual number
A dedicated +1 line lets you receive US calls and dial out with an American caller ID at local rates.
Dial during off-peak Eastern hours
Some carriers vary international rates by time of day; a quick check before a long call adds up.
Skip per-minute roaming
On a US trip, a local eSIM plus a calling app beats your home carrier's roaming rate.
Why businesses get a USA virtual number
The US is the most-screened phone market on earth — unknown and international numbers get sent to voicemail by default. A genuine +1 area-code number is how you get picked up: a 212 reads as New York, a 415 as San Francisco, and either one outperforms a foreign caller ID on answer rates. A US virtual number is a real American DID that rings wherever your team already works, no US office required.
Higher answer rates
A local US caller ID is answered far more often than an unfamiliar +44, +91 or +971 string.
Lower trust friction
A recognizable area code (212, 310, 312…) signals you're established in that market.
Cheaper for your customers
Americans call a local number at local rates, so cost is never a reason to skip your call.
Centralized routing
Calls forward to your existing contact center, mobile or SIP platform — handled from anywhere on earth.
Faster market entry
Launch a US presence in a day instead of incorporating a US entity first.
Real PSTN presence
An authentic US DID in the city of your choice, landing on your phone system worldwide.
USA virtual numbers with My Country Mobile
MCM provisions US virtual numbers as part of a platform spanning 190+ countries and 17,500+ businesses across telecom, BPO, fintech, e-commerce and enterprise. You get the American DID in the area code you want, carrier-grade routing built for the US's heavy spam-filtering, and the APIs to wire it into whatever softphone, PBX, contact center or CRM you already run.
Local DIDs in major area codes — provisioned in minutes
Call forwarding to any mobile, landline, SIP endpoint, or softphone worldwide
HD voice with G.711, G.729, Opus & AMR-WB — auto-negotiated per call
Sub-150ms latency on major voice corridors via distributed PoPs
99.99% uptime SLA backed by geo-redundant infrastructure & sub-2s failover
WebRTC support for browser-based calling without softphone installs
REST APIs for provisioning, routing & call detail records (CDRs)
Built-in fraud protection with AI anomaly detection & STIR/SHAKEN
24/7 network monitoring and dedicated support
How to get your USA virtual number
Most businesses are live within hours, not days.
Pick your area code — Choose the city you want to look local in: New York 212, LA 310, Chicago 312, or any of 350+ codes.
Point the calls somewhere — Forward to a mobile, an existing PBX, a SIP trunk or a softphone — MCM routes to any destination.
Provision it — Grab a single number in the self-service portal, or use the REST API for bulk numbers and CRM integration.
Go live — Take calls with caller ID, recording, STIR/SHAKEN attestation and CDR access from day one.
Other country dialing guides
More country codes worth bookmarking.
Get a USA virtual number with MCM
Put a real +1 number in front of American customers — local caller ID, STIR/SHAKEN attestation, global routing, sub-150ms latency and a 99.99% uptime SLA, trusted by 17,500+ businesses. No credit card, 5-minute setup, no contracts.
USA +1 — FAQ
What is the country code for the USA?expand_more
It's +1. You dial it after your country's exit code (00 from the UK and most of the world, 0011 from Australia) and before the 10-digit US number.
Is +1 only the United States?expand_more
No. +1 covers the whole North American Numbering Plan — the US, Canada and around twenty Caribbean nations all use it. The three-digit area code is what identifies the US specifically.
How do I call a US number from the UK / India / Australia?expand_more
Dial your exit code + 1 + the 3-digit area code + the 7-digit number — e.g. from the UK: 00 1 212 555 1234. Or simply use +1 212 555 1234 from any mobile.
How many digits is a US phone number?expand_more
Ten: a 3-digit area code plus a 7-digit local number. The area code is required on every call, including mobiles.
Do I drop a 0 when calling the US?expand_more
No. US numbers have no trunk 0, so there's nothing to drop. Dial +1 + area code + number exactly.
How can I tell if a US number is a mobile or a landline?expand_more
You can't from the number alone. US mobiles and landlines share the same area-code ranges, and portability lets a number move between carriers and even between cell and fixed lines.
What's the difference between "1" and "+1"?expand_more
Inside the US, the leading 1 is the domestic long-distance trunk. +1 is the international country code you use from abroad. Don't combine them as "+1 1…".
Can I call a US 800 toll-free number from another country?expand_more
Usually not — US toll-free numbers (800, 833, 844, 855, 866, 877, 888) typically only work within North America. From abroad you need the company's standard +1 geographic number.
What time is it in the US right now?expand_more
It depends on the zone: the country spans six, from Eastern (UTC−5) to Hawaii (UTC−10), and most regions observe daylight saving while Hawaii and most of Arizona don't.
How can I get a US phone number if I don't live in the United States?expand_more
A US virtual number from MCM gives you a real +1 line in the area code you choose, ringing on your existing devices anywhere in the world — no US address or company needed.