@Sasha M Thanks for posting your question in Microsoft Q&A, apologize for any inconvenience caused on this.
Both local and toll-free numbers are 10-digit phone number, local phone numbers consist of local area codes in the United States. These phone numbers are generally used by individuals and local businesses. Azure Communication Services offers local numbers in the United States. These numbers can be used to place phone calls, but not to send SMS messages.
Toll-free numbers are used for applications like IVR systems/bot or SMS messages.
To know more about Toll-free vs Local refer here.
- Please be aware that the pricing for purchasing a phone number will vary depending on the geographic region. For a complete pricing list based on region, please refer to this document.
- For more information on the various pricing scenarios for calling and sending SMS using a phone number, please review the documentation.
- If you have purchased a toll-free number and wish to use it in your application, you will need to verify the number. Please follow the documented steps to verify your toll-free number in ACS.
Hope this helps let me know if you have any further questions on this.