# Number list use cases

This section provides real-world examples of how to use **Number Lists** to manage inbound call filtering. You'll learn
how to add numbers and set rules to allow or block calls based on specific criteria.

With **Number Lists**, you can:

- **Block unwanted calls** from specific prefixes or numbers.
- **Allow calls** from specific prefixes or numbers, while blocking all other calls.
- **Load Balance** your traffic based on the incoming CLI.

**Block calls from a prefix**

Learn how to create a number list, which blocks calls from a specific prefix.

[Block calls from a prefix](block-calls-from-prefix.html)

**Block a phone number**

Learn how to create a number list, which blocks calls from a specific phone number.

[Block a phone number](block-phone-number.html)

**Allow calls from selected countries**

Learn how to create a number list, which allows calls from a specific prefix, but blocks others.

[Allow calls from selected countries](allow-calls-from-countries.html)

**Use number lists for load balancing**

Learn how to use number lists as a load balancing tool for different SIP endpoints.

[Use number lists for load balancing](use-number-lists-for-load-balancing.html)