Toll-Free#
A Toll-Free Sender ID is a US Toll-Free DID number used to send A2P SMS messages. Recipients see the DID number as the message sender. It can also support replies when two-way messaging is available.
Common uses#
Use a Toll-Free Sender ID when recipients should see a US Toll-Free number and may need to reply. Common uses include:
Customer care and support.
Account and service notifications.
Delivery and appointment updates.
Authentication messages.
Informational and marketing messages that meet the applicable requirements.
How messages appear#
Recipients see the approved Toll-Free DID number as the message sender. The same number can provide a consistent sender for customer support, service notifications, and other approved business messages.
Fig. 1. Example message from a Toll-Free Sender ID.#
Messaging and replies#
Recipients can reply to messages sent from a Toll-Free Sender ID when two-way messaging is supported. To receive their replies, use a Toll-Free DID number that supports inbound SMS and assign it to an inbound SMS trunk. Recipients can reply only if their mobile network supports it.
Relationship with DID numbers#
A Toll-Free Sender ID is a US Toll-Free DID number assigned to the DIDWW account. Before including the number in a verification, either purchase it or port an existing number to DIDWW.
The number must be active, available in My Numbers, and support Outbound A2P SMS. See the supported feature filters.
A DID number already assigned to another Sender ID Verification cannot be selected for a new verification.
Availability#
Toll-Free Sender ID availability is limited to the United States.
Check current availability on the DIDWW website or view the available verification options in the DIDWW User Panel.
Verification requirements#
Each Toll-Free DID number must be included in an approved verification before use. The submitted business identity, messaging use case, consent process, sample messages, and supporting information must match the messages sent from the number.
Approval does not guarantee message delivery or remove carrier sending limits. You must continue to follow all applicable consent, content, and messaging requirements.
For required submission fields, see Toll-Free verification.
To submit a verification, see Create Toll-Free Sender ID Verification.
Using a verified Sender ID#
After the verification becomes Active, the selected Toll-Free DID numbers can be used as Sender IDs. Associate the verification with an outbound SMS trunk and send only messages that match the approved business and messaging use case.
For sending instructions, see Send SMS using verified Sender ID or the HTTP Specification.