International Dialing & SMS

Tropo developer accounts are massively enabled for free testing, and international dialing is no exception. While still using a developer account, you can call out to landlines in the following countries completely for free (please note that U.S. means continental U.S. - Hawaii, Alaska and Puerto Rico are omitted as a general rule, as is the Caribbean despite also starting with country code 1):

    • 1 U.S. and most of Canada
    • 30 Greece
    • 31 Netherlands
    • 32 Belgium
    • 33 France
    • 34 Spain
    • 351 Portugal
    • 352 Luxembourg
    • 353 Ireland
    • 36 Hungary
    • 39 Italy
    • 41 Switzerland
    • 44 UK
    • 46 Sweden
    • 48 Poland
    • 49 Germany
    • 852 Hong Kong
    • 972 Israel

In order to make outgoing calls, you will need to contact support (either through the forums or via and request access. You won't be able to dial any non-US mobile number while still in a developer account; using a production account, you can call out to any number. Certain additional numbers are off limits all together, such as 911 for the US Emergency and 44999 for UK Emergency.

In order to dial an international number, it needs to be in the following format (this example is for the Netherlands with the country code 31):


No need to include 011 (the code you typically need to include to place a call an international number from the US).

Once you decide it's time to move into production, you can check the rate for calls and messages to any country on our pricing page.

International Phone Numbers

We offer local numbers in the US and 41 other countries - here's the full list of available countries, note that these are also free for developer accounts:

    Australia, Austria, Belgium, Brazil, Bulgaria, Canada, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hong Kong, Hungary, Ireland, Israel, Italy, Japan, Latvia, Lithuania, Luxembourg, Malta, Mexico, Netherlands, New Zealand, Norway, Panama, Peru, Poland, Portugal, Slovakia, Slovenia, South Africa, Spain, Sweden, Switzerland, UK, US (including Puerto Rico)

Some countries have legal limitations on who can receive a phone number, requiring that you or your company is located there. To get a phone number in Croatia, Denmark, France, Germany, Ireland, Hungary, the Netherlands, or Norway, you'll need to contact Tropo Support with a home or office address in that country before we can give you a number.

For Croatia, Norway and Germany, you'll also need to provide documentation proving you live in the area that matches the phone number's country code and prefix (so if you request a number that begins with +49 221, you'll need to provide documentation proving you live in Köln, Germany). We accept utility bills, an identification document (like a driver's license), a business license or a lease contract. We cannot accepts screen shots, business cards or letter head.

When you open your application and hit "Add a new phone number", you'll see a link to open a support ticket for numbers in these areas; once opened, you can include your documentation or address there. Note that the process to procure a number in your specific region can take up to 10 days, depending on number availability.

International SMS

Currently Tropo applications can send SMS messages to worldwide (i.e., non-U.S.) locations if the application has an attached Canadian number; this applies to both development and production applications. However, like international calling, you must contact support (either through the support portal or via and request access. Applications with Canadian numbers can also receive SMS messages from non-U.S. numbers.

Tropo numbers outside the U.S. or Canada are not SMS enabled, so they are not able to send or receive SMS at this time. We are, however, actively working on getting SMS enabled numbers in additional countries.