USA Country Code +1: Complete International Dialing Guide (2026)
The United States country code is +1. The same +1 code is shared with Canada and several Caribbean nations under the North American Numbering Plan (NANP). This guide covers the exact dialing format, area codes, time zones, and how to call any US number from India, UK, UAE, or Australia.
Quick Answer
USA country code: +1. Shared with Canada. To dial from India: 00 1 + 10-digit US number. To dial from UK: 00 1 + 10-digit US number. US numbers are always exactly 10 digits (3-digit area code + 7-digit number).
USA Country Code: The Basics
The United States uses country code +1, assigned under the ITU-T E.164 international numbering plan and administered as part of the North American Numbering Plan (NANP). The NANP also covers Canada, Jamaica, Trinidad and Tobago, and approximately 20 other countries — all of which share the +1 country code.
- +Country code: +1 — shared with Canada, Jamaica, Trinidad, and others under NANP.
- +US numbers: always 10 digits (NXX-NXX-XXXX format, where N = 2–9).
- +Format: [3-digit area code] + [3-digit exchange] + [4-digit number] = 10 digits total.
- +No leading 0 in US numbers — unlike UK, Germany, and France which use a trunk prefix 0.
- +International format: +1 followed by the full 10-digit number — no modifications needed.
e.g., +1 212 456 7890 (New York) or +1 310 555 0100 (Los Angeles)
How to Dial USA from Any Country
The table below shows the complete dialing sequence from the most common countries that call the USA. The IDD (International Direct Dialing) prefix varies by country — on smartphones, you can always use the + symbol as a universal substitute for any IDD prefix.
| Calling From | IDD Prefix | Full Format | Example (NYC 212-456-7890) |
|---|---|---|---|
| 🇮🇳 India | 00 | 00 1 + 10-digit number | 00 1 212 456 7890 |
| 🇬🇧 UK | 00 | 00 1 + 10-digit number | 00 1 212 456 7890 |
| 🇦🇪 UAE | 00 | 00 1 + 10-digit number | 00 1 212 456 7890 |
| 🇦🇺 Australia | 0011 | 0011 1 + 10-digit number | 0011 1 212 456 7890 |
| 🇩🇪 Germany | 00 | 00 1 + 10-digit number | 00 1 212 456 7890 |
| 🇫🇷 France | 00 | 00 1 + 10-digit number | 00 1 212 456 7890 |
| 🇸🇦 Saudi Arabia | 00 | 00 1 + 10-digit number | 00 1 212 456 7890 |
| 🇸🇬 Singapore | 001 | 001 1 + 10-digit number | 001 1 212 456 7890 |
Note: Unlike UK, Germany, and France, US numbers do NOT start with a leading 0. You dial the full 10-digit number directly after +1. Example: for number (212) 456-7890, dial +1 212 456 7890 — no changes needed.
Major US Area Codes by City
The USA uses a three-digit area code system as part of the NANP. Large cities like New York and Los Angeles have multiple area codes due to population growth and the proliferation of mobile numbers. The area code always forms the first three digits of the 10-digit US number.
| City | Area Code(s) | International Format |
|---|---|---|
| New York City | 212, 646, 718, 917, 332, 929 | +1 212..., +1 646... |
| Los Angeles | 213, 323, 310, 818, 626, 424 | +1 213..., +1 310... |
| Chicago | 312, 773, 872 | +1 312..., +1 773... |
| Houston | 713, 832, 281 | +1 713..., +1 832... |
| Phoenix | 602, 480, 623 | +1 602..., +1 480... |
| Philadelphia | 215, 267, 445 | +1 215..., +1 267... |
| San Antonio | 210, 726 | +1 210..., +1 726... |
| San Diego | 619, 858 | +1 619..., +1 858... |
| Dallas | 214, 469, 972 | +1 214..., +1 469... |
| San Francisco | 415, 628 | +1 415..., +1 628... |
| Washington DC | 202 | +1 202... |
| Boston | 617, 857 | +1 617..., +1 857... |
| Miami | 305, 786, 754 | +1 305..., +1 786... |
| Seattle | 206, 253 | +1 206..., +1 253... |
| Atlanta | 404, 678, 770 | +1 404..., +1 678... |
The + icon indicates additional area codes not listed here. Cities continue to add new area codes as number demand grows.
USA Time Zones — Quick Reference
The USA spans six time zones. Most of the country observes Daylight Saving Time (DST), shifting clocks one hour forward in spring and back in autumn. The time difference from India (IST, UTC+5:30) varies accordingly — the figures below show winter (standard) / summer (DST) offsets.
| Time Zone | States | UTC | India Ahead (winter / summer) |
|---|---|---|---|
| Eastern (ET) | NY, FL, MA, PA, etc. | UTC-5/-4 | 10.5 / 9.5 hrs |
| Central (CT) | TX, IL, MN, etc. | UTC-6/-5 | 11.5 / 10.5 hrs |
| Mountain (MT) | CO, AZ, NM | UTC-7/-6 | 12.5 / 11.5 hrs |
| Pacific (PT) | CA, OR, WA | UTC-8/-7 | 13.5 / 12.5 hrs |
| Alaska (AKT) | AK | UTC-9/-8 | 14.5 / 13.5 hrs |
| Hawaii (HST) | HI | UTC-10 | 15.5 hrs (no DST) |
Note: Arizona (except the Navajo Nation) does NOT observe DST — it stays on MST (UTC-7) year-round. This means during US summer, Arizona is on the same time as Pacific (PT) rather than Mountain (MT).
Special US Number Types
Not all US numbers starting with +1 are reachable from abroad. Understanding these number types helps you avoid wasted call attempts before dialing internationally.
| Type | Example | Notes |
|---|---|---|
| Toll-free (national) | 1-800, 1-888, 1-877, 1-866, 1-855 | Free within USA; usually NOT dialable internationally |
| Premium rate | 1-900 | Pay-per-call; not dialable from abroad |
| Geographic (standard) | 1-XXX-XXX-XXXX | Callable internationally using +1 |
| Google Voice | +1 area code | VoIP number, callable internationally |
Toll-free tip: US 1-800 and other toll-free numbers are usually not dialable from outside the US. If you need to reach a US company from abroad, ask for their direct geographic number. You can then dial it with +1 followed by the 10-digit number.
How Much Does It Cost to Call USA?
Traditional carrier rates for international calls to the USA vary significantly by country, but VoIP services like Voizly can reduce costs by 3–9x. The table below compares standard carrier rates with Voizly's flat rate.
| Calling From | Carrier Rate | Voizly Rate | Savings |
|---|---|---|---|
| India (Airtel) | ₹3–4/min | $0.04 (~₹3.3) | Similar, no SIM needed |
| UK (BT) | ~20p/min | $0.04 (~3p) | 6x cheaper |
| UAE (Etisalat) | AED 0.50/min | $0.04 (~AED 0.15) | 3x cheaper |
| Australia (Telstra) | AUD 0.50/min | $0.04 (~AUD 0.06) | 8x cheaper |
| Germany (Telekom) | €0.35/min | $0.04 (~€0.037) | 9x cheaper |
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Calling USA from India — Step by Step
India uses 00 as its international exit code (IDD prefix). Here is the exact sequence to dial any US number from an Indian landline or mobile phone.
Dial 00
India's international exit code (IDD prefix).
Dial 1
USA (and Canada) country code under NANP.
Dial the 10-digit US number
No changes needed — dial all 10 digits as-is.
Example — call New York (212) 456-7890:
00 1 212 456 7890
On mobile: +1 212 456 7890
US numbers include a 3-digit area code + 7-digit number. No leading zeros to remove.
Frequently Asked Questions
What is the USA country code?
How do I call a US number from India?
Do US phone numbers always have 10 digits?
Can I call US toll-free numbers (1-800) from India?
What is the difference between +1 USA and +1 Canada?
What is the cheapest way to call USA from other countries?
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