International Calls to USA: How to Dial From Any Country

Calling the USA From Anywhere: A Step-by-Step Guide

The US phone number looks simple enough — ten digits, no unusual formatting. The part that trips people up is everything that comes before it, because that part depends entirely on which country the call is originating from.

This guide covers the full sequence for reaching a US number from abroad, the exit codes that vary by region, a worked example, and how to keep the cost down if the calls happen regularly.

THE THREE PARTS OF EVERY CALL TO THE USA

A call into the United States always has three parts, in order:

• Exit code — tells your local network you're dialing internationally; this is the one piece that changes by country
• Country code — 1 — the US and Canada share this single country code across the entire North American Numbering Plan
• 10-digit US number — the area code plus the 7-digit local number, always 10 digits total

Get the exit code right for your own country and the rest of the sequence never changes, no matter which US number you're calling.

STEP 1: DIAL YOUR COUNTRY'S EXIT CODE

The exit code is the one variable in this whole process, and it depends on where the call starts.

From most of Europe, Asia, Africa, and Oceania, the exit code is 00. From within North America (calling the US from Canada, Mexico, or a Caribbean NANP country), the exit code is 011, treated as a domestic long-distance call in some cases. A handful of countries use a different code entirely — Australia uses 0011, for example — so it's worth a quick check if the standard 00 doesn't connect.

On any mobile phone, worldwide, holding the 0 key until a "+" appears replaces the exit code entirely. The "+" auto-translates to the correct exit code for whatever network the phone is on, which makes it the most reliable format to save in contacts.

STEP 2: ADD THE COUNTRY CODE — 1

After the exit code (or the "+"), dial 1. This single digit is the country code for the entire North American Numbering Plan, which covers the US, Canada, and several Caribbean nations — it's what routes the call into that shared numbering system before the specific 10-digit number takes over.

So the sequence so far reads 00 1 (from most countries) or +1 (from any mobile).

STEP 3: ADD THE 10-DIGIT US NUMBER

Every US number is exactly 10 digits: a 3-digit area code identifying the region, followed by a 7-digit local number. There's no leading 0 to drop and no separate mobile format — US mobile and landline numbers use the identical structure, unlike many countries' numbering systems.

That means a New York number written domestically as (212) 555-0123 becomes +1 212 555 0123 when dialed from abroad — the parentheses and area code just get read as the first three of the ten digits.

A WORKED EXAMPLE

Calling a Los Angeles number, (310) 555-0199, from the UK: dial 00 (UK exit code) + 1 (country code) + 310 555 0199. On a mobile: +1 310 555 0199.

Calling the same number from Canada: since Canada shares the NANP, it's often dialed as a domestic long-distance call — 1 + 310 555 0199, with no international exit code needed at all.

COMMON MISTAKES TO AVOID

Using the wrong exit code. 00 doesn't work everywhere — confirm the correct code for the originating country if the call won't connect.

Dropping the country code 1. Some callers assume the 10-digit US number is enough on its own. It isn't, when dialing internationally — the 1 has to precede it.

Miscounting the 10 digits. The part after the country code 1 must total exactly 10 digits — 3 for the area code, 7 for the local number. Nine or eleven means a digit is missing or extra.

HOW TO KEEP THE COST DOWN

Traditional carrier rates for calls into the US vary enormously by origin country, and can run anywhere from a few cents to well over a dollar per minute on standard international plans.

VoIP is the practical fix for regular callers. Routing calls over the internet instead of a traditional carrier network cuts per-minute cost sharply and normalizes pricing across origin countries, which matters if calls to the US happen often rather than as a one-off. Businesses handling this at scale typically move to a UCaaS (Unified Communications as a Service) platform — a single cloud system for calling, messaging, and video — the same setup covered in our guide to calling Mexico from the US for the reverse direction. My Country Mobile builds international calling plans specifically for this kind of two-way traffic. Contact us to talk through a setup for regular international calling into the US.

Businesses that receive a high volume of inbound international calls often skip the exit-code sequence for their customers entirely by getting a US virtual number, letting international customers or offices dial in at a domestic US rate instead of navigating their own country's international dialing rules. The ITU's international numbering guidance is the authoritative source on how country codes and exit codes are assigned worldwide, for anyone who wants the full technical background.

Conclusion

Calling the USA from anywhere comes down to the same three-part sequence every time: your own country's exit code, the shared country code 1, and the 10-digit US number. The exit code is the only variable, and it's worth confirming once per originating country rather than assuming 00 works everywhere. For anyone making these calls regularly, VoIP or a proper international calling plan closes the gap between a few cents a minute and the inflated rates some carriers still charge for calls into the US.

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