How to Send a Fax to Another Country: Country Codes, Number Format & Why Faxes Fail

Sending a fax to another country sounds like it should be complicated, and for decades it was — you needed a fax machine, an international calling plan, and the patience to dial a long string of country and area codes correctly. In 2026 the hard part is down to exactly one thing: getting the recipient's number formatted correctly. Everything else is handled for you by an online service. This guide explains the international fax number format, gives you the country codes for the most-faxed destinations, explains the leading-zero rule that trips up most people, and shows you how to fax 93 countries in about three minutes.

The Simple Version: Three Parts to Every International Fax Number

Every international fax number is built from three parts, in this order:

That single transformation — drop the leading zero, add the country code — is the entire skill of international faxing. Get it right and the fax goes through. Get it wrong and it fails. The good news: OverseasFax does the country-code part for you, so you only have to handle the local number.

How to Format an International Fax Number

Take the number exactly as the recipient gives it to you (in their local format), then apply two changes:

• Add the country code at the front (OverseasFax does this automatically when you pick the country).
• Remove the leading zero from the area code, for the vast majority of countries.

Do not add spaces, dashes, or your own country's exit code (like 011 in the US). Do not repeat the country code if the recipient already included it. The cleanest input is just the local digits, minus the leading zero.

The Leading-Zero Rule — the #1 Cause of Failed International Faxes

This is the most important paragraph in this guide. In most countries, local phone and fax numbers are written with a leading 0 — a domestic trunk prefix used only for dialing within that country. That leading zero must be dropped when dialing from abroad.

For example, a fax number in London might be written locally as 020 7946 0958. Dialed internationally it becomes +44 20 7946 0958 — the 0 disappears and +44 takes its place. Countries where this leading-zero rule applies include the United Kingdom, Germany, France, the Netherlands, Australia, Japan, and many more.

The exceptions are worth memorizing: the United States and Canada do not use a leading zero at all (their numbers stay the same after +1), and Italy is unusual in that it keeps its leading zero internationally. If your international fax fails and the number looks otherwise correct, check the leading zero first — it is by far the most likely culprit.

Country Codes for Popular Fax Destinations

Here are the international calling codes for the most commonly faxed destinations. With OverseasFax you never type these — selecting the country applies the code — but they are useful to recognize.

OverseasFax supports 93 countries in total — see the full international fax guide for the complete list.

Step-by-Step: Send a Fax to Another Country

The entire process takes about three minutes from any phone or computer.

Why International Faxes Fail — and How to Fix Each Cause

If your fax to another country did not go through, it is almost always one of these, roughly in order of how common they are:

• Leading zero kept by mistake — the number-one cause. Drop the leading zero for almost every country (Italy excepted). Fix: remove the 0 and resend.
• Country code missing or wrong — the fax cannot route. Fix: use OverseasFax, which applies the code automatically from your country selection.
• Recipient line busy — common with single-line fax numbers. Fix: wait a few minutes and resend.
• Recipient machine off, out of paper, or jammed — nothing you can do from your end. Fix: confirm with the recipient and resend later.
• Wrong department's number — the fax may arrive at a different machine. Fix: confirm the exact fax number and department.
• Out-of-service or mistyped number — Fix: verify each digit with the recipient.

With OverseasFax, if delivery cannot be confirmed you receive an automatic full refund — so a failed attempt costs you nothing, and you can correct the number and try again.

How OverseasFax Removes the Formatting Problem

The reason international faxing feels hard is the number formatting — and that is exactly the part OverseasFax automates. When you select the destination country from the dropdown:

• The correct country code is applied automatically — you never look it up or type it.
• The interface reminds you to drop the leading zero and enter only the local digits.
• The price for that country appears instantly so there are no surprises.

That removes the two most common mistakes — wrong or missing country code, and keeping the leading zero — leaving you with a single simple task: type the local number. It is the easiest way to get international fax formatting right the first time.

Country-Specific Quirks Worth Knowing

Italy keeps its leading zero

Italy is the classic exception. Unlike almost every other country, Italian numbers keep the leading 0 after the +39 country code. Dropping it — as you correctly would for the UK or Germany — causes the fax to fail. If you fax Italy, keep the zero.

The US and Canada have no leading zero

North American numbers under +1 never use a leading zero, so there is nothing to drop. (And for purely domestic US or Canada faxes, use FaxForADollar.com at $1.00.)

Mexico and some others vary

A few countries have transitional or mixed numbering rules. When in doubt, enter the number without the leading zero first; if it fails, confirm the exact international format with the recipient. OverseasFax's automatic refund means testing costs nothing.

Is It Safe to Fax Overseas?

Yes — and for sensitive documents it is generally safer than email. OverseasFax uses HTTPS encryption for the upload, deletes your document immediately after transmission, and routes the fax point-to-point over the fax network rather than through cloud inboxes. Payment is handled by Stripe in a PCI-compliant environment, so your card details never touch OverseasFax servers. For international documents like passports, contracts, medical records, and financial statements, faxing through OverseasFax avoids the multi-server exposure that email carries.

Frequently Asked Questions

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