Phone number

A phone number in E.164 format. This means that phone numbers always include an international country prefix (e.g. +38760183628). The cleaning and validation functions for this try to be smart about by accepting a list of countries as an argument in order to add the number prefix.

When adding a property of this type to an entity, any country-type properties defined for the entity are considered for validation. That means that adding a phone number to an entity before adding a country can have a different validation outcome from doing the two operations the other way around. Always define the country first.