How do I maximize the accuracy of API phone validation?

Make sure all phone numbers include the full international format with the country code, such as +1 or +44.

The system ignores special characters such as hyphens, periods, parentheses and spaces and validates the phone numbers correctly.

Remember to include the country code when you pass the phone number to GetResponse. If you don’t, we may not be able to validate the phone number, and it won’t append to your subscriber’s profile.

If you cannot ensure that every phone number passes to our API with the

country code, use the following two methods to increase accuracy:

1. Pass the subscribers’ Country custom field.

2. Pass the subscribers’ IP addresses via the API (click here for more info)

The system will attempt to determine the country code based on the above two fields (prioritizing #1 over #2). As a last resort, it will assume that the subscriber’s country code is the same as that of your GetResponse account.