Adds regex-based phone number patterns and country filter settings to the tenant’s SMS and Voice suppression list. The request may include patterns, countries, or both. A tenant can have either a country allow list or a block list, but not both. Supported countryFilterType values are ALLOW and BLOCK.

If the countryFilterType is changed for an existing list, all existing entries are retained. Country entries are reassigned to the new countryFilterType and merged with the country entries provided in the request. Pattern entries are merged with the existing patterns.

Note: To change the countryFilterType between BLOCK and ALLOW, it is recommended to first delete the existing list using the DELETE API, then add the new list using the POST API.

Entitlements required: manageSmsVoiceOtpSuppressionList (Manage SMS and voice OTP suppression list).