List of best mirrors for IP address 3.15.229.15, located in an unknown country.
I am very sorry, but no mirror was found. Feel free to download directly:
http://mirrordirector-mb.raspbian.org/raspbian/pool/main/q/qt6-base/qt6-base-dev-tools_6.4.2+dfsg-10+rpi1_armhf.deb