Phone Number Formatting on Form Submissions

contacts

#1

Currently we are using form submissions via the API, and sending in data in the format of +19938838833, as can be seen here: https://app.hubspot.com/contacts/2638133/contact-beta/2401/. There is no formatting when looking at it from the Hubspot web interface. How should we handle international phone numbers? Do we send in the regional number, and the the country code via another field for Hubspot to handle internally?