List of best mirrors for IP address 216.73.216.203, 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/d/debian-installer-netboot-images/debian-installer-11-netboot-amd64_20210731+deb11u12_all.deb