List of best mirrors for IP address 18.226.187.60, located in an unknown country.
I am very sorry, but no mirror was found. Feel free to download directly:
http://mirrordirector-mb.raspbian.org/multiarch/pool/main/q/qtwebkit-opensource-src/libqt5webkit5-dev_5.212.0~alpha2-21+rpi1_arm64.deb