Sender IDs
A sender ID is an alphanumeric name that identifies the sender of an SMS message. When
you send an SMS message using a sender ID, and the recipient is in an area where sender
ID authentication is supported, your sender ID appears on the recipient's device instead
of a phone number. A sender ID provides SMS recipients with more information about the
sender than a phone number or short code provides. For example, a fictitious company Example Corp could use the sender ID EXAMPLECO
Sender IDs are supported in many countries and regions around the world. In some places, if you're a business that sends SMS messages to individual customers, you must use a sender ID that's pre-registered with a regulatory agency or industry group. For a complete list of countries and regions that support or require sender IDs, see SMS and MMS country capabilities and limitations.
Advantages
Sender IDs provide the recipient with more information about the message sender. It's easier to establish your brand identity by using a sender ID than by using a short or long code. There's no additional charge for using a sender ID.
Disadvantages
Support and requirements for sender ID authentication aren't consistent across all countries or regions. Several major markets (including Canada, China, and the United States) don't support sender ID. In some areas, you must have your sender IDs pre-approved by a regulatory agency before you can use them.
Topics
Sender ID country capabilities and limitations
For more information on which countries support sender IDs see the Supports Sender IDs column in Supported countries and regions for SMS messaging.
Registered and dynamic sender IDs
Registered sender ID – A registered sender ID is registered with a regulatory agency or industry group. For a complete list of countries and regions that support or require sender IDs, see Supported countries and regions for SMS messaging.
Dynamic sender ID – A dynamic sender ID does not have to be registered with a regulatory agency or industry group. Registration requirements can change quickly and it is recommended that you complete any optional registration for dynamic sender IDs. For a complete list of countries and regions that support or optionally have sender ID registration, see Supported countries and regions for SMS messaging.
Considerations for a Sender ID
When you are creating a Sender ID you should consider the following:
Choose a Sender ID that matches your company branding and SMS service or use case
Numeric-only Sender IDs are not supported
AWS End User Messaging SMS sender ID supported characters (some countries might override these):
No special characters except for dashes (-)
No spaces
Valid characters: a-z, A-Z, 0-9
Minimum of 3 characters
Maximum of 11 characters
If the country you're sending to requires registration you must submit a registration for each AWS Region you plan on sending from
