---
title: "How do I register an SMS sender ID in Saudi Arabia?"
description: "How to register an SMS sender ID in Saudi Arabia: CST and operator approval, STC, Mobily and Zain, the 11-character format, documents and typical lead times."
canonical: "https://omnichannels.ai/answers/register-sender-id-saudi-arabia/"
language: "en"
updated: "2026-10-10"
publisher: "BroadNet Technologies"
brand: "OmniChannels.ai"
---

# How do I register an SMS sender ID in Saudi Arabia?

Canonical: https://omnichannels.ai/answers/register-sender-id-saudi-arabia/
Language: en
Publisher: OmniChannels.ai by BroadNet Technologies

**Short answer:** To register an SMS sender ID in Saudi Arabia, a business applies through a licensed provider for CST and operator approval on STC, Mobily and Zain KSA. The ID is alphanumeric, Latin or Arabic, up to 11 characters, one per legal entity per use case, supported by company documents. Unregistered IDs are typically blocked.

## What are the Saudi sender ID rules?

The Communications, Space and Technology Commission (CST), formerly CITC, regulates A2P messaging in the Kingdom. Sender IDs need approval from CST and the operators before any traffic flows.

| Rule | Requirement |
|---|---|
| Format | Alphanumeric, Latin or Arabic, up to 11 characters |
| Scope | One sender ID per legal entity per use case |
| Approval | CST plus the operators STC, Mobily and Zain KSA |
| Unregistered IDs | Typically blocked |

## How does the registration process work?

1. Pick a sender name that matches the brand shown in your messages.
2. Define the use case, for example OTP and alerts or promotions.
3. Prepare the company documents your provider requests, such as a commercial registration and a letter of authorisation.
4. Submit through your provider for CST and operator approval.
5. Test delivery on STC, Mobily and Zain KSA once the ID is approved.

## How long does Saudi sender ID registration take?

BroadNet's typical lead time for Saudi sender IDs is 5 to 10 business days. It is a guide, not a guarantee: missing documents and operator reviews add time, and the timeline is confirmed at onboarding.

## What rules apply once the ID is live?

CST's Regulations for Curbing SPAM Messages and Calls ban promotional messages from 22:00 to 09:00, and from 01:00 to 12:00 during Ramadan; transactional messages may be sent at any time. Consent should be captured in line with the PDPL. OmniChannels.ai registers Saudi sender IDs through BroadNet, with fees passed through at cost.

## Official sources

- [Communications, Space and Technology Commission (CST)](https://www.cst.gov.sa/en/)
- [CST Regulations for Curbing SPAM Messages and Calls](https://www.cst.gov.sa/en/regulations-and-licenses/regulations/Document-522)

## Related questions

- https://omnichannels.ai/answers/what-is-sender-id/
- https://omnichannels.ai/answers/saudi-promotional-sms-hours/
- https://omnichannels.ai/answers/saudi-pdpl-messaging/
- https://omnichannels.ai/answers/register-sender-id-uae/

Updated: 2026-10-10