---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/lookup/magic-numbers-for-lookup#article
headline: Magic Numbers for Lookup
description: Use Twilio Lookup Magic Numbers and test credentials to simulate Lookup API requests and responses without charging your account or using real numbers.
url: https://www.twilio.com/docs/lookup/magic-numbers-for-lookup
inLanguage: en
dateModified: 2026-08-13T17:05:12.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# Magic Numbers for Lookup

Twilio provides you with a set of test credentials so you can
exercise parts of the Lookup API without charging your account. You
can find your credentials in the
[Auth Tokens page of your Console](https://console.twilio.com/us1/account/keys-credentials/api-keys?frameUrl=%2Fconsole%2Fproject%2Fapi-keys%3Fx-target-region%3Dus1).

You use these credentials in the same way as your live credentials. However,
when you authenticate with your test credentials, **we will not charge your
account, update the state of your account, or connect to real phone numbers**.

## Lookup packages compatible with Magic Numbers

Magic Numbers work with the Identity Match, SIM Swap, Reassigned Number, and SMS Pumping Risk packages. When you make an API request with your test credentials, Twilio validates all inputs as though the request were made with your real credentials.

The full set of magic inputs and outputs are detailed in each subpage.

* [Lookup - Identity Match](/docs/lookup/magic-numbers-for-lookup/testing-identity-match-with-magic-numbers)
* [Lookup - SIM Swap](/docs/lookup/magic-numbers-for-lookup/testing-sim-swap-with-magic-numbers)
* [Lookup - Reassigned Number](/docs/lookup/magic-numbers-for-lookup/testing-reassigned-number-with-magic-numbers)
* [Lookup - SMS Pumping Risk](/docs/lookup/magic-numbers-for-lookup/testing-sms-pumping-risk-with-magic-numbers)

Requests to any other product with test credentials will receive a `403 Forbidden` response.

> \[!WARNING]
>
> These Magic Numbers are for **testing** purposes only and will only work for the ***Lookup packages*** . The information requested and returned are fake names, phone numbers, addresses, etc... just to illustrate how our packages work and what the responses would look like for different situations.