# Test numbers

Test numbers are the phone numbers you send to when you preview and validate a message before going live. This page covers adding, renaming and removing them, the per-plan limit, and how they're used in a test send.

**Language:** en
**Audience:** platform
**Translation key:** platform.project-settings.test-numbers
**Search keywords:** test numbers, test number, test phones, test phone, preview, test send, validate message, send a test
**Related pages:** /platform/es/project-settings/test-numbers, /platform/en/campaigns/test-sends, /platform/en/project-settings
**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/test-numbers/ (HTML) · https://docs.instasent.com/platform/en/project-settings/test-numbers.md (Markdown)
**Other language (es):** https://docs.instasent.com/platform/es/project-settings/test-numbers.md

Test numbers are the phone numbers you send a message to when you want to check it before the real send — see exactly how it lands on a device: the sender, the text, the links, the formatting. You manage them under **Settings → Tools → Test phones**, and you use them when you [send a test](/platform/en/campaigns/test-sends) from a campaign.

## Adding a test number

Click **Add test number**, enter the phone number and, optionally, a name to recognise it by. The number is validated by format and accepted straight away — there's no confirmation code to enter.

{/* VERIFY: confirm there is also no server-side verification (OTP) — the panel doesn't ask for a confirmation code, but the backend behaviour isn't confirmed here. */}

![The test numbers list showing the phone number, name and created date columns, with the Add test number button above](/platform/en/project-settings/images/test-numbers--1-list-add-button.png)
*The test numbers list, with the Add test number button and the phone number, name and created columns.*

## Editing and removing

- **Edit** — you can change a test number's **name**. The number itself can't be edited; to change the number, remove it and add the new one.
- **Remove** — removing a test number takes effect immediately.

## Limit

How many test numbers you can add depends on your plan — the panel shows your current maximum. When you reach it, adding is blocked with a notice. There's also a short cool-down: if you've changed these numbers several times in a row, you wait a little before changing them again.

{/* VERIFY: the exact per-plan limit value and the cool-down logic. */}

## Permissions

Adding, editing and removing test numbers require the project-write permission. Without it, the list is read-only.

Once you have a test number, head to [Test sends](/platform/en/campaigns/test-sends) to preview a campaign before sending it for real.

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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.