With Hoiio Call Tracking, you have the option to remove the country code from the number.

Here's how to do it:
- Go to the call tracking app, select the campaign and click the edit (pencil icon) next to the tracker.
- Go to the 'subscription' tab and under "Display Format", deselect the checkbox which says, " Include country calling code." as shown in screenshot below:

- Click on "save changes" and the country code will no longer be displayed!