A2P 10DLC (Application-to-Person 10-Digit Long Code) is the registration that lets a business send SMS and MMS from a standard 10-digit phone number through Aloware.
US mobile carriers require it for messages to the United States. Canadian traffic follows different rules, so whether you need to register depends on where you send from and where the recipient is.
When registration is required
The direction of the message decides whether A2P 10DLC registration applies:
Type of traffic | A2P 10DLC Registration |
Canada to Canada (CA to CA) | Not required |
Canada to United States (CA to US) | Required |
United States to Canada (US to CA) | Required |
To register, follow the business and brand registration guide.
Where Aloware warns about unregistered lines
When a line in your account has a 10DLC number that is not in an A2P campaign, Aloware warns you in these places:
Talk: a banner at the top of the page reads "IMPORTANT - Some of your Outbound SMS/MMS Messages are being blocked by the major carriers! Please submit your REQUIRED 10DLC Campaign for approval today." The banner has a Submit info button.
Broadcasts: the same banner shows at the top of the page while you set up a broadcast.
Sequences: when you pick an unregistered line as the Outbound line for a new sequence, a warning says: "Due to regulatory requirements from carriers you are unable to send out messages, please register your lines in an A2P Campaign to access this feature." The warning has a Register Now button.
Power dialer session settings
When the 10DLC banner shows at the top of the page, the Power Dialer Session Settings window stays fully visible, and you can change the SMS Line without closing the banner.
Session Settings can also show the notice "This line is Calling Only. Pick a line that can send SMS." This notice is not about A2P 10DLC registration. It appears when the line selected in Line is Calling Only (its numbers are marked as call only).
With a Calling Only line, Use the same line to send SMS clears and cannot be checked, and the SMS Line selector lists only lines that can send SMS.
