Short Code Best Practices
SimpleSMSSend is recommended for sending single, immediate text messages.
AdvancedSMSSend is recommended for sending scheduled text messages and allows multiple numbers with one message, or multiple numbers with individual messages.
Know when your SMS was sent or received with the PostBackURL System. CDYNE SMS Notify! API will automatically post information to a URL you specify when text messages are sent or received via DIDs and short codes. PostBackURL data is posted behind the scenes, and is not visible on your webpage. Code samples are provided on how to capture this data to store in a database. CDYNE recommends that the data returned to be stored within your systems for reporting and reference information.
Dedicated short codes send up to 35 messages per second per short code.
Coverage & Area Codes
Short codes are country specific. A U.S. short code will only send messages in the U.S., and a Canadian short code will only send messages in Canada.
- U.S. short code carriers supported
- Canadian short code carriers supported
SMS and Daylight Savings Time
SMS Notify! recognizes the date and time in UTC (Coordinated Universal Time). When clocks move forward 1 hour in the spring, most time zones will need to remove one hour from their UTC offset. For example, Eastern Standard Time (EST) is UTC -5 hours but Eastern Daylight Time (EDT) is UTC -4 hours.