Carrier#

A Carrier Sender ID is a dynamic Sender ID selected according to the rules of the destination carrier. The business does not choose or reserve the Sender ID that recipients see.

DIDWW also generates a DDWW0xxxxx Sender ID for submitting traffic. This value is different from the Sender ID that recipients see.

Common uses#

Carrier Sender IDs are commonly used for:

  • Authentication messages.

  • Account, service, and delivery notifications.

  • Messaging to supported Latin American countries.

Use this type when recipients do not need to see a fixed business name or phone number.

How messages appear#

The destination carrier determines the Sender ID that recipients see. It may not match the business name or phone numbers in the DIDWW account, and it may change between messages.

Example message using a Carrier Sender ID with a link for help or opting out.

Fig. 1. Example message using a Carrier Sender ID.#

Messaging and replies#

Carrier Sender IDs are intended for one-way messages. Recipients should not be expected to reply to the displayed Sender ID. If recipients must reply to a fixed phone number, use a Long-code or Toll-Free Sender ID.

Relationship with DID numbers#

A Carrier Sender ID is not linked to a DID number in the DIDWW account. You do not need to purchase, port, or assign a phone number to use this Sender ID type.

Availability#

Carrier Sender ID availability varies by country.

View the available verification options in the DIDWW User Panel.

Verification requirements#

Before using this type, you must have an Active Carrier Sender ID Verification. The verification links the business and messaging use case to the destination countries submitted for review.

The DIDWW-generated Sender ID is created automatically and cannot be changed. It is shown as a copyable value on the verification list, view page, and edit page.

The business identity, message content, consent process, and messages sent must meet the requirements of each destination country.

For required submission fields, see Carrier verification.

To submit a verification, see Create Carrier Sender ID Verification.

Using a verified Sender ID#

After the verification becomes Active, send messages that match the approved business, destination countries, and messaging use case through the associated outbound SMS trunk.

For sending instructions, see Send SMS using verified Sender ID or the HTTP Specification.