Represents a phone number split into multiple parts:

• country_code - Uniquely identifiers the country to which the number belongs. This value is based on the E.164 standard (en.wikipedia.org/wiki/E.164)
• number - The subscriber number (10 digits in length)
• extension - A number that can route to different phones at a location

This phone number format is biased towards those types found in the United States and may need to be adjusted for international support.