# Use Cases
source: https://developer.mastercard.com/account-catalog-services/documentation/use-cases/index.md

In this section, you learn about different use case scenarios of the Account Catalog Services API.

* [PAN Registration](https://developer.mastercard.com/account-catalog-services/documentation/use-cases/pan-registration/registering_a_new_pan_to_envl_service/index.md)
* [Account Range Registration use case](https://developer.mastercard.com/account-catalog-services/documentation/use-cases/ac-range-enablement/prod-grad-account-range/index.md)

## Next Steps {#next-steps}

* Now that you have an understanding of the different use cases the service uses, proceed to the [API Reference](https://developer.mastercard.com/account-catalog-services/documentation/api-reference/index.md) section to interact with all of our endpoints in the API Explorer.
* You can head to our [Testing](https://developer.mastercard.com/account-catalog-services/documentation/testing/index.md) page for request scenarios.
* Refer [Codes and Formats](https://developer.mastercard.com/account-catalog-services/documentation/code-and-formats/index.md) for the complete list of response codes, reason codes, and formatting rules.