> ## Documentation Index
> Fetch the complete documentation index at: https://kero.chat/help/llms.txt
> Use this file to discover all available pages before exploring further.

# Messaging Resources

> Find country-specific messaging availability, Sender ID requirements and practical resources for SMS, RCS and WhatsApp Business.

Messaging requirements can vary depending on the channel you're using and the countries you're sending messages to.

The Kero Messaging Resources section brings together useful reference information to help you understand channel availability, prepare for local requirements and plan your business messaging.

## Explore messaging resources

> **[Messaging Directories](https://kero.chat/help/messaging-resources/messaging-directories/rcs-availability-by-country.md)**
>
> Explore RCS availability by country and SMS Sender ID requirements for different destinations.

> **[SMS Resources](https://kero.chat/help/messaging-resources/sms-resources/about-sms-sender-ids.md)**
>
> Understand SMS Sender IDs, when registration may be required and how to get started.

## More resources coming soon

We're continuing to expand our messaging resources, including guidance for WhatsApp Business.

> [!NOTE]
>
> Messaging availability, pricing and regulatory requirements can change. Always check the latest requirements for your destination country before launching a campaign.


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