Toll-free messaging involves sending and receiving texts from a number with an 800 prefix, but it can also include numbers beginning with 888, 877, 866, 855, 844 and 833. Toll-free texting advantage is that it is classified as application-to-person (A2P), which allows messages to be sent at a higher message-per-second (MPS) rate than 10DLC methods. A disadvantage is that unlike toll-free numbers, 10DLC supports both transactional messaging only, and can include any US area code. 

Although less strict than the 10DLC approval process, the registration process is similar:

Registration process

In order to use a Toll Free Number, fill this form. Part of that information will be shared  with The Campaign Registry, a third party that approves or rejects your registration based on the information. In some cases, registration occurs immediately. For example, if your campaign was previously registered with The Campaign Registry, they might already have your information. However, some campaigns might take one week or longer for approval.

After your company and TFN campaign are approved, you can purchase a TFN number and associate it with your campaign. Requesting a TFN might also take up some days. Although you can associate multiple TFNs with a single campaign, you can’t use the same TFN across multiple campaigns. For each campaign you create, you need to have a unique TFN.