Why does the country code default to +1 when I add a number to a user profile?

Question

Why is my country code defaulting to +1 when I add a number to a user profile?

Answer

The Support interface and Twilio backend design defaults the country code to US country code +1 if your phone number is nine digits. This leads Twilio to read the number as a number from the USA by default.

For more information, see the article: Managing end user settings.