Error Code and Warning Dictionary

21606: The 'From' phone number provided is not a valid message-capable phone number for this destination/account
SMS messages can only be sent from a phone number or supported sender that is active, available in your account, and capable of sending SMS. If the selected...
Tue, 1 Sep, 2026 at 1:26 PM
30035: Number not fully registered for A2P messaging. Please wait up to 24 hours after approval.
Error 30035 occurs when you try to send SMS from a newly registered U.S. A2P 10DLC number before carrier-level provisioning has fully completed. Even if the...
Tue, 1 Sep, 2026 at 1:32 PM
20003 - Credentials are invalid or the account has been suspended
Error 20003 occurs when a request cannot be authenticated because the connected account credentials are invalid, expired, or no longer active. It can also ...
Tue, 1 Sep, 2026 at 1:37 PM
Custom Module Visibility by Role & Location
Custom Module Links in the App Customizer give you advanced control over who can see specific navigation links and where they appear. By combining role-base...
Tue, 1 Sep, 2026 at 1:46 PM
30453: Blocked by the recipient's carrier as a fraud precaution
A temporary SMS restriction can occur when carrier fraud-prevention systems identify unusual or potentially suspicious traffic to a destination number. Thes...
Tue, 1 Sep, 2026 at 1:51 PM
Error 30024: Numeric sender ID not provisioned on carrier
Description This error means the destination carrier requires a pre-registered numeric sender, but the sender being used has not yet been provisioned with ...
Wed, 9 Sep, 2026 at 3:46 AM