in src/objects/serverside/utils.js [297:310]
static isInternationalPhoneNumber (phone_number: string) {
// strip up to 2 leading 0s and +
phone_number = phone_number.replace(PHONE_NUMBER_DROP_PREFIX_ZEROS, '');
if (phone_number.startsWith('0')) {
return false;
}
if (phone_number.startsWith('1')) {
return US_PHONE_NUMBER_REGEX.test(phone_number);
}
return INTL_PHONE_NUMBER_REGEX.test(phone_number);
}