International Fax — Sending Abroad and Non-US Numbers
International faxing covers two things: sending a fax from your account to a recipient in another country, and the availability of fax numbers outside the United States. Both hinge on country codes, correct dialing format, and the simple fact that a fax call traveling a long distance over more network hops is slower and less predictable than a domestic one. Send FAX Mail sends to international destinations when you format the number correctly, and is candid that delivery varies by destination.
How a international fax number works
An international fax number is written in E.164 form: a plus sign, the country code, then the national number. The United States and Canada share country code 1; the United Kingdom is 44, Germany is 49, Japan is 81, Australia is 61. A common mistake is leaving the national trunk prefix in place — many countries write local numbers with a leading 0 (as in 020 for London), but when you dial internationally you drop that 0 after the country code, so +44 20 rather than +44 020. A fax itself is negotiated over the T.30 protocol, and over long international routes that handshake — and the T.38 transport that carries it over IP — has more latency and more chances to drop, so an overseas fax can take longer and is more sensitive to line quality than a domestic send. On Send FAX Mail you enter the recipient in full international format, we place the call, and you get a delivery result back.
When it's the right fit
- ✓A US business faxing contracts, purchase orders, or forms to a supplier or branch in another country
- ✓An immigration, legal, or shipping office that regularly corresponds with overseas counterparts by fax
- ✓A company serving customers abroad who still rely on fax for signed paperwork
- ✓Anyone who needs to reach a destination where fax remains the accepted channel for official documents
Setting one up
- 1Confirm the recipient's full number in international format: plus sign, country code, then the national number
- 2Drop any leading 0 national trunk prefix after the country code — for example dial +44 20, not +44 020
- 3Compose the fax in your dashboard and enter the recipient in that full international format
- 4Send, then watch the delivery result; if a distant line fails to negotiate, resend, since long routes are more variable
Honest limitations
- Delivery reliability varies by destination — some countries and carriers negotiate fax far more cleanly than others
- Long international routes add latency to the T.30 handshake, so sends take longer and are more prone to retries
- Number availability outside the US is uneven; not every country offers a fax number you can hold on this platform
- Some destinations apply their own restrictions or costs to inbound fax that are outside any provider's control
How it compares
| Type | Cost | Setup | Best for |
|---|---|---|---|
| International | Varies by destination country | Format with country code; availability varies | Reaching or appearing in another country |
| Toll-Free | Slightly higher, folded into the plan | Minutes, US and Canada reach | No-charge-to-sender reach across North America |
| Local | Lowest carrier cost | Minutes, one US area code | A single-region domestic line |
International fax numbers — FAQ
Write it in E.164 form: a plus sign, the country code, then the national number. The most common error is keeping the leading 0 that countries print in local numbers — drop it after the country code, so a London number is +44 20 xxxx xxxx, not +44 020.
A fax negotiates over the T.30 protocol, and on a long international route that handshake passes through more network hops with more latency. That makes overseas sends slower and more sensitive to line quality, so a resend after a failed negotiation is more common than it would be domestically.
Yes. Anyone abroad can dial your US or toll-free number in their own international format and reach you, and the inbound fax arrives in your dashboard as a PDF the same as a domestic one. Receiving from abroad is generally more dependable than sending to certain distant destinations.
No, and we will not pretend otherwise. Delivery depends on the destination country's carriers and line quality, which no fax provider controls. Many countries negotiate cleanly; some are inconsistent. If a destination is critical, send a short test page first and confirm it lands before relying on it.
No. You send from your own US or toll-free number to any recipient's number worldwide — you only need the recipient's number in correct international format. A foreign number is only relevant if you want a local presence in that country, which depends on availability.
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