Your radio came preloaded with repeaters in the Repeater List. RepeaterBook recommends saving a copy of the list to your PC in the event you would like to restore it. You can also download a current copy from the Icom site here or go to the same source Icom gets there data at dstarinfo.com.
Those two sources will only serve D-Star-capable repeaters. You can store analog repeaters from Repeaterbook.com using the Repeater List Generator.
To create an export, perform any one of the supported searches and choose Export » Icom » Repeater List. An intermediate page where appear where you can fill in Group Index and Group Name values.
This Repeater List has been confirmed to work with the following cloning software:
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