# Tracking numbers

> Choose, assign, and test US tracking numbers without losing the campaign and original source behind each call.

Canonical page: https://getleadsource.io/docs/tracking-numbers/

Lead Source documentation

## Tracking numbers

Choose, assign, and test US tracking numbers without losing the campaign and original source behind each call.

Documentation

[Overview](https://getleadsource.io/docs/)
[Getting started](https://getleadsource.io/docs/getting-started/)[Tracking numbers](https://getleadsource.io/docs/tracking-numbers/)[Call routing setup](https://getleadsource.io/docs/call-routing/)[Website number swapping](https://getleadsource.io/docs/website-attribution/)[Call review and reporting](https://getleadsource.io/docs/call-review/)[Send events to another tool](https://getleadsource.io/docs/webhooks/)[API access](https://getleadsource.io/docs/api/)[Publisher ping and handoff](https://getleadsource.io/docs/publisher-ping-post/)[A pay-per-call example](https://getleadsource.io/docs/pay-per-call-workflow/)[An agency reporting example](https://getleadsource.io/docs/agency-reporting-example/)[Troubleshooting](https://getleadsource.io/docs/support/)

Reviewed October 15, 2026

### A number for one source

A dedicated number identifies the place where you publish it. Use separate numbers for sources you need to compare. Reusing one number in unrelated ads makes that distinction unavailable.

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#### Select the account first

Open Phone numbers in the correct business or client account. Check the purchase allowance and current charge.

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#### Choose the number and destination

Choose an available US number. Set where it rings, attach the relevant campaign when needed, and review recording preferences.

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#### Confirm the purchase

Read the price and confirm deliberately. Then place an approved test and inspect the call in the same account.

### Moving or releasing a number

Keep a written mapping of the old source, new source, and change date. Update ads, websites, and phone links before releasing an old number. Releasing a number may make it unavailable to recover. Do not use number reassignment to rewrite past attribution.

[Routing setup](https://getleadsource.io/docs/call-routing/)[Number pools](https://getleadsource.io/docs/website-attribution/)[Published rates](https://getleadsource.io/pricing/)

[Explore the walkthrough](https://getleadsource.io/demo/)[Review product availability](https://getleadsource.io/integrations/)