List of best mirrors for IP address 3.138.101.219, 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/libg/libgnatcoll-bindings/libgnatcoll-zlib-dev_24.0.0-2_armhf.deb