Mobile Originated (MO) Numbers

You can configure and manage MO Numbers to receive inbound messages from users. These are useful for 2-way campaigns, user input flows, opt-ins, and more.

1. Long Numbers

Long numbers are standard mobile numbers that users can text directly.

2. Sub-numbers

Sub-numbers allow for number segmentation under a main shared number (e.g., 12345-001, 12345-002). Users send SMS to the main number, and sub-routing is handled internally.

3. Short Codes

Short codes are special shortened phone numbers (e.g., 12345) used primarily for high-volume and marketing-grade SMS communication. They are ideal for campaigns, alerts, or promotional interactions where memorability and throughput are key.

4. Keywords

Keywords are terms (e.g., “JOIN”, “INFO”, “STOP”) that users text to your short codes, long numbers, or sub-numbers to trigger specific flows or actions.

They’re essential for 2-way messaging automation, user opt-ins, segmentation, and onboarding.