If you run `host` with https://google.com, this strips http[s]:// and the trailing / (zsh only)

host

#!/usr/bin/env zsh

# I only use host for checking records, and 9 times out of 10
# I copy paste the url from my browser. Chrome adds http[s]://.../

if [ -n "$1" ]
    then
        # 1 parameter, let's do this thing
        /usr/bin/host ${${1#*//}%/*}
    else
        # Carry on
        /usr/bin/host "$@"
fi