Phone number field type The E.164 phone number standard ensures that all necessary information for a phone number is included and properly formatted to successfully route an international call over a territory's public telephone network. When a user enters a phone number, it is received and stored as a string of numbers. An E.164 phone number field automatically formats and validates the numbers so that they are E.164-compliant when displayed as local and international numbers. The E.164 phone number field type does not replace the phone field type. An E.164 phone number field displays: [Optional] A choice list for the phone number territory. [Always] An input box for entering phone numbers. [By Default] A red underline when a phone number does not match the format for the selected phone territory and cannot be saved. [Optional] A green underline when a phone number does not match the format for the selected phone territory but can be saved with Other / Unknown as the territory. Figure 1. Phone e164 Territories assignedTerritories are assigned to locations, and are not assigned directly to users.Dependent fieldsIn the dictionary, you can specify a dependent field in the User or Location field, which displays the appropriate territory in the selector choice list when a user enters a phone number.E.164 phone number field configurationAdministrators can use the phone number system properties and dictionary attributes to do certain things.Configure a territory phone display ruleThe string of numbers that make up a phone number is automatically validated and formatted for a specific territory by applying a series of regular expressions.