Workflows allow you to automate and schedule text messages to yourself or your invitees. Use text messages to stay informed about upcoming meetings or remind yourself of follow-up tasks after they conclude. You can also reduce no-shows by sending automated reminders to invitees before meetings start.
How text messages are sent
Text messages are sent through Twilio, a third-party communication platform, using a randomly generated phone number (usually with a US area code, such as Atlanta). Messages are unmonitored, and invitees can opt in or out of receiving text messages at any time.
Some phone carriers in certain countries have strict filters that may block messages from being delivered. For more details, refer to Twilio's support article.
Guidelines for sending text messages
- To offer high-quality text messaging features, Calendly has set a limit on the number of text messages organizations can send. To learn more, check out this article.
- For Group event types, text messages are only available for meetings with 100 or fewer invitees. For larger meetings, consider using email Workflows instead.
- Shared URL shortening services, such as Bit.ly, are not supported in text messages. Some carriers block these links, increasing the risk of messages being filtered or undelivered. For more details, refer to Twilio's support article.
Text message character limits
- Each text message can include up to 180 characters, and a real-time character count helps you track message length.
- If a variable, such as an event type name, exceeds the character limit, the message will still be delivered without being cut off.
- When including invitee answers from booking forms, Calendly automatically shortens each response to 40 characters or fewer to reduce the number of messages sent.
Which countries can I send SMS messages from?
ASIA
Afghanistan (+93)
Armenia (+374)
Azerbaijan (+994)
Bahrain (+973)
Bangladesh (+880)
Bhutan (+975)
Brunei (+673)
Cambodia (+855)
China (+86)
East Timor (+670)
Georgia (+995)
Hong Kong (+852)
India (+91)
Indonesia (+62)
Iraq (+964)
Israel (+972)
Japan (+81)
Jordan (+962)
Korea Dem People's Rep (+850)
Korea Republic of (+82)
Kuwait (+965)
Kyrgyzstan (+996)
Laos PDR (+856)
Lebanon (+961)
Macau (+853)
Malaysia (+60)
Maldives (+960)
Mongolia (+976)
Myanmar (+95)
Nepal (+977)
Oman (+968)
Pakistan (+92)
Palestinian Territory (+970)
Philippines (+63)
Qatar (+974)
Saudi Arabia (+966)
Sri Lanka (+94)
Syria (+963)
Taiwan (+886)
Tajikistan (+992)
Thailand (+66)
Turkey (+90)
Turkish Republic of Northern Cyprus (+90)
Turkmenistan (+993)
United Arab Emirates (+971)
Uzbekistan (+998)
Vietnam (+84)
Yemen (+967)
EUROPE
Albania (+355)
Andorra (+376)
Austria (+43)
Belarus (+375)
Belgium (+32)
Bosnia and Herzegovina (+387)
Bulgaria (+359)
Canary Islands (+3491)
Croatia (+385)
Cyprus (+357)
Czech Republic (+420)
Denmark (+45)
Estonia (+372)
Faroe Islands (+298)
Finland/Aland Islands (+358)
France (+33)
Germany (+49)
Gibraltar (+350)
Greece (+30)
Hungary (+36)
Iceland (+354)
Ireland (+353)
Italy (+39)
Kosovo (+383)
Latvia (+371)
Liechtenstein (+423)
Lithuania (+370)
Luxembourg (+352)
Macedonia (+389)
Malta (+356)
Moldova (+373)
Monaco (+377)
Montenegro (+382)
Netherlands (+31)
Norway (+47)
Poland (+48)
Portugal (+351)
Romania (+40)
San Marino (+378)
Serbia (+381)
Slovakia (+421)
Slovenia (+386)
Spain (+34)
Sweden (+46)
Switzerland (+41)
Ukraine (+380)
United Kingdom (+44)
Vatican City (+379)
AFRICA
Algeria (+213)
Angola (+244)
Benin (+229)
Botswana (+267)
Burkina Faso (+226)
Burundi (+257)
Cameroon (+237)
Canary Islands (+3491)
Cape Verde (+238)
Central Africa (+236)
Chad (+235)
Comoros (+269)
Congo (+242)
Congo, Dem Rep (+243)
Djibouti (+253)
Egypt (+20)
Equatorial Guinea (+240)
Eritrea (+291)
Ethiopia (+251)
Gabon (+241)
Gambia (+220)
Ghana (+233)
Guinea (+224)
Guinea-Bissau (+245)
Ivory Coast (+225)
Kenya (+254)
Lesotho (+266)
Liberia (+231)
Libya (+218)
Madagascar (+261)
Malawi (+265)
Mali (+223)
Mauritania (+222)
Mauritius (+230)
Morocco/Western Sahara (+212)
Mozambique (+258)
Namibia (+264)
Niger (+227)
Nigeria (+234)
Reunion/Mayotte (+262)
Rwanda (+250)
Sao Tome and Principe (+239)
Senegal (+221)
Seychelles (+248)
Sierra Leone (+232)
Somalia (+252)
South Africa (+27)
South Sudan (+211)
Spain (+34)
Sudan (+249)
Swaziland (+268)
Tanzania (+255)
Togo (+228)
Tunisia (+216)
Uganda (+256)
Zambia (+260)
Zimbabwe (+263)
OCEANIA
American Samoa (+1684)
Australia/Cocos/Christmas Island (+61)
Cook Islands (+682)
Fiji (+679)
French Polynesia (+689)
Guam (+1671)
Marshall Islands (+692)
Micronesia (+691)
New Caledonia (+687)
New Zealand (+64)
Northern Mariana Islands (+1670)
Palau (+680)
Papua New Guinea (+675)
Samoa (+685)
Solomon Islands (+677)
Tonga (+676)
Tuvalu (+688)
Vanuatu (+678)
NORTH AMERICA
American Samoa (+1684)
Anguilla (+1264)
Antigua and Barbuda (+1268)
Aruba (+297)
Ascension (+247)
Bahamas (+1242)
Barbados (+1246)
Belize (+501)
Bermuda (+1441)
Canada (+1)
Cayman Islands (+1345)
Costa Rica (+506)
Cuba (+53)
Dominica (+1767)
Dominican Republic (+1809201)
Dominican Republic (+1809)
Dominican Republic (+1849)
Dominican Republic (+1829)
El Salvador (+503)
Greenland (+299)
Grenada (+1473)
Guadeloupe (+590)
Guam (+1671)
Guatemala (+502)
Haiti (+509)
Honduras (+504)
Jamaica (+1876)
Martinique (+596)
Mexico (+52)
Montserrat (+1664)
Netherlands Antilles (+599)
Nicaragua (+505)
Northern Mariana Islands (+1670)
Panama (+507)
Puerto Rico (+1787)
St Kitts and Nevis (+1869)
St Lucia (+1758)
St Pierre and Miquelon (+508)
St Vincent Grenadines (+1784)
Trinidad and Tobago (+1868)
Turks and Caicos Islands (+1649)
United States (+1)
Virgin Islands, British (+1284)
Virgin Islands, U.S. (+1340)
SOUTH AMERICA
Argentina (+54)
Bolivia (+591)
Brazil (+55)
Chile (+56)
Colombia (+57)
Ecuador (+593)
Falkland Islands (+500)
French Guiana (+594)
Guyana (+592)
Paraguay (+595)
Peru (+51)
Suriname (+597)
Uruguay (+598)
Venezuela (+58)
SMS Regulation Usage & Compliance
We recommend reviewing Twilio's Acceptable Use Policy for a comprehensive understanding of these guidelines. It's essential to also emphasize that Twilio's Messaging Policy aligns with US carrier regulations, and exceptions to these standards are not permissible.