> ## Documentation Index
> Fetch the complete documentation index at: https://checklyhq.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# SMS Alerts
> Configure SMS text messages and phone call notifications for critical alerts and emergency escalation
**Monitoring as Code**: Learn more about the [SMS Alert Channel Construct](/constructs/sms-alert-channel).
The phone numbers used for SMS alerting need to be in [E.164 format](https://www.twilio.com/docs/glossary/what-e164) format. Stick to the following rules and you'll be fine:
* Prepend international access codes with a + sign
* Do not use any white spaces
* Use up to 15 characters
You can add as many SMS channels as you like.
## Supported countries and regions
### North America
| | |
| -------------------------------------------------------------------------------------- | -------------------------------- |
| 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) |
| Curaçao and Caribbean Netherlands (Bonaire, Sint Eustatius, Sint Maarten, Saba) (+599) | Dominica (+1767) |
| Dominican Republic (+1829) | Dominican Republic (+1849) |
| Dominican Republic (+1809201) | Dominican Republic (+1809) |
| El Salvador (+503) | Greenland (+299) |
| Grenada (+1473) | Guadeloupe (+590) |
| Guatemala (+502) | Haiti (+509) |
| Honduras (+504) | Jamaica (+1876) |
| Martinique (+596) | Mexico (+52) |
| Montserrat (+1664) | Nicaragua (+505) |
| 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) | |
### 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) |
| Iran (+98) | 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, +972) |
| Philippines (+63) | Qatar (+974) |
| Saudi Arabia (+966) | Singapore (+65) |
| Sri Lanka (+94) | Syria (+963) |
| Taiwan (+886) | Tajikistan (+992) |
| Thailand (+66) | Turkiye (+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) | Guernsey/Jersey (+44) |
| Hungary (+36) | Iceland (+354) |
| Ireland (+353) | Isle of Man (+44) |
| Italy (+39) | Kosovo (+383) |
| Latvia (+371) | Liechtenstein (+423) |
| Lithuania (+370) | Luxembourg (+352) |
| Malta (+356) | Moldova (+373) |
| Monaco (+377) | Montenegro (+382) |
| Netherlands (+31) | Norway (+47) |
| Poland (+48) | Portugal (+351) |
| Republic of North Macedonia (+389) | Romania (+40) |
| San Marino (+378) | Serbia (+381) |
| Slovakia (+421) | Slovenia (+386) |
| Spain (+34) | Sweden (+46) |
| Switzerland (+41) | Turkish Republic of Northern Cyprus (+90) |
| Ukraine (+380) | United Kingdom (+44) |
| Vatican City (+379) | |
### 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) |
### Africa
| | |
| ---------------------------- | ----------------------------- |
| Algeria (+213) | Angola (+244) |
| Benin (+229) | Botswana (+267) |
| Burkina Faso (+226) | Burundi (+257) |
| Cameroon (+237) | 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) | 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) |
| Kiribati (+686) | Marshall Islands (+692) |
| Micronesia (+691) | New Caledonia (+687) |
| New Zealand (+64) | Niue (+683) |
| Norfolk Island (+672) | Northern Mariana Islands (+1670) |
| Palau (+680) | Papua New Guinea (+675) |
| Samoa (+685) | Solomon Islands (+677) |
| Tonga (+676) | Tuvalu (+688) |
| Vanuatu (+678) | Wallis and Futuna (+681) |
## SMS alert number and sender ID
SMS alerts will be sent with a sender ID and phone number. The Checkly sender ID is 'Checkly'. If your carrier does not support sender ID, you will instead see the Checkly SMS alert phone number, +1(814) 250 8623.
For limits and other SMS-related questions, please refer to our [Pricing page](https://www.checklyhq.com/pricing/#features).