Phone Country Codes REST Endpoints

List of Values/Phone Country Codes
The country codes resource is used to get the country codes for phone numbers. All responses for the country codes resource will include a response header Cache-Control. The Cache-Control header indicates the amount of time for which the results are cached in the browser. For example, Cache-Control: "private, max-age=3600" indicates that the response is cached in the browser for 1 hour (3600 seconds). You need to have PER_MANAGE_PERSON_PHONE_PRIV.
Get a Country Code
Method: get
Path: /crmRestApi/resources/11.13.18.05/countryCodes/{PhoneCountryCodeId}
Get all Country Codes
Method: get
Path: /crmRestApi/resources/11.13.18.05/countryCodes