"Some offices" understates it a bit, just under half their workforce is in Ukraine according to their careers pages.
EDIT: I misread it, it's most of their workforce.
Wow, 1700 teammates in Ukraine vs 40 in the US (according to their site). Didn't know it was such a stark difference.
Oh, I misread the page! I thought it was 2000 in the US, but that's the year their offices were established. That means the large majority of their workforce is Ukrainian.
How is that you even need 1700 people to run a domain registrar?