Text Message Length
The maximum message length depends on the parameters in the
SendMessage request. Note that spaces are included in the character count.
IsUnicode = True and
Concatenate = True, the max message length is 67 characters
Concatenate = True, the max message length is 153 characters
IsUnicode = True, the max message length is 70 characters
IsUnicode = False and
Concatenate = False, the max message length is 160 characters
United States SMS
All U.S. carriers limit their text messages to 160 characters in length (including spaces). When sending a text message to a recipient in the U.S. with more than 160 characters, the SMS Notify! API will automatically split the message into two or more messages for delivery.
Messages from Canadian carriers vary from 136 to 160 characters in maximum length (including spaces). Esendex sends to Canada the same way as the U.S. To ensure complete message delivery, Esendex advises that your application only send messages to Canadian recipients in 136-character increments. If the message is longer than 136 characters, the best practice is to split the message on your application side at the 136-character mark; this will prevent data loss that may occur from Canadian carriers that truncate anything over 136 or 140 characters.
Use postbacks to know when your MT message has been sent or your application has received a MO or response message. Esendex SMS Notify! API will automatically post information to a URL you specify each time an SMS has been sent or received. See our wiki for information about how to use postbacks.
DID System Keywords
The SMS Notify! API will automatically respond to select keywords when receiving text messages with DIDs.
Short Code System Keywords
The SMS Notify! API will automatically respond to select keywords when receiving text messages with short codes.
Short Code Incoming Keyword Management
You may assign non-system keywords to short codes.
The SMS Notify! API supports Unicode with International Extended DIDs.
SMS Notify! supports message concatenation.
SMS or MMS and Invalid Phone Numbers
SMS Notify! automatically cleans up certain phone number errors. Learn more about handling invalid phone numbers.
- 220.127.116.11 - 18.104.22.168
- 22.214.171.124 - 126.96.36.199