SMS-enabled phone numbers (also known as long codes or DIDs) are VOIP-based phone numbers that allow two-way text messaging. In the U.S., an SMS-enabled phone number is equivalent to a 10-digit phone number (e.g., 757-544-9510), and may be obtained through an SMS Provider.
Unlike short codes which require an 6-8 weeks provisioning process, phone numbers may be purchased for immediate, long term use and are a low-cost alternative messaging option. These numbers are a good fit for businesses that require a local number, need to send text messages internationally, will send two-way P2P messaging, and have lower messaging volumes. Automated bulk sending of text messages is not allowed with DIDs.