# Senders

Where you see and manage the senders for each channel in a project. This is an orientation page: it explains what the Channels area shows and points to the Channels collection for adding, registering and verifying senders per channel and country.

**Language:** en
**Audience:** platform
**TLDR:** A project's senders live under Settings → Channels, with one tab per channel (SMS and RCS): for each sender you see its identity, approved or pending countries, reach and status. From there you create a new sender, set the channel default or archive unused ones; the full detail of adding, registering and verifying senders is documented per channel (SMS senders and RCS agents).
**Translation key:** platform.project-settings.senders
**Search keywords:** senders, sender, sender id, sms sender, rcs sender, channels, manage senders, default sender, sender id alphanumeric
**Related pages:** /platform/es/project-settings/senders, /platform/en/channels, /platform/en/channels/sms/senders-registration, /platform/en/channels/rcs/senders-verification
**Docs index (every page):** https://docs.instasent.com/llms.txt
**This zone's index:** https://docs.instasent.com/platform/en/llms.txt
**This page:** https://docs.instasent.com/platform/en/project-settings/senders/ (HTML) · https://docs.instasent.com/platform/en/project-settings/senders.md (Markdown)
**Other language (es):** https://docs.instasent.com/platform/es/project-settings/senders.md

A sender is the identity your messages are sent from — an SMS sender ID or an RCS agent. You see and manage the senders for a project in its **Channels** area, under **Settings → Channels**. This page is a quick map of what's there; the full detail of adding, registering and verifying a sender lives in the [Channels](/platform/en/channels) collection.

## What the Channels area shows

The **Channels** area lists your senders per channel, with a tab for **SMS** and one for **RCS**. For each sender you see its identity, the countries where it's allowed or still pending, how many recipients it can reach, and its current status. A filter switches between available and archived senders.

From here you create a new sender, set one as the default for its channel, and archive ones you no longer use.

> **Note**: An **SMS sender ID** is up to **11 alphanumeric characters**. A sender made only of numbers isn't allowed.

![The Channels area with the SMS and RCS tabs, listing each sender with its identity, reachable recipients, approved countries and pending status](/platform/en/project-settings/images/senders--1-channels-area.png)
*The Channels area: senders listed per channel, with the SMS and RCS tabs and the Create Sender ID button.*

## Where to go next

The substance of working with senders — requesting them, registering an SMS sender with carriers, verifying an RCS agent, and the per-country rules — is documented per channel:

- [Channels](/platform/en/channels) - The overview of every channel and how to turn one on.
- [SMS senders](/platform/en/channels/sms/senders-registration) - Create an SMS sender ID and register it with the carriers.
- [RCS senders](/platform/en/channels/rcs/senders-verification) - Create and verify your RCS agent per country.

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This is one page of the Instasent documentation. For the complete machine-readable index of every guide and API reference, fetch https://docs.instasent.com/llms.txt — start there for full context.