"Unknown location"

Hi,
during todays login, my account was initially locked and I had to enter an access code I recieved by mail:

Your Path of Exile account has been locked because someone attempted to log in from a location that you don't typically play from - "Unknown Location".

Wondering if I should change my password or what could cause this from an "unknown location".

Thank you.

That just means they couldn’t geo-locate the IP address you had at the time.

It’s more common when using cellular networks & satellite-based providers.

Provided the log in attempt was an expected one you yourself initiated, it’s not cause for concern.