> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cdp.coinbase.com/llms.txt
> Use this file to discover all available pages before exploring further.

# UsePhoneNumberStateOptions

Options for the usePhoneNumberState hook.

## Properties

| Property                                              | Type                                     | Description                                   |
| ----------------------------------------------------- | ---------------------------------------- | --------------------------------------------- |
| <a id="phonenumber" /> `phoneNumber?`                 | `string`                                 | The initial E.164 phone number string.        |
| <a id="countrycode" /> `countryCode?`                 | `CountryCode`                            | The initial country code. Defaults to "US".   |
| <a id="onphonenumberchange" /> `onPhoneNumberChange?` | (`e164`: `string`) => `void`             | Callback when the E.164 phone number changes. |
| <a id="oncountrycodechange" /> `onCountryCodeChange?` | (`countryCode`: `CountryCode`) => `void` | Callback when the country code changes.       |