Please note: If your ip shown above has something like 10.X.X.X or 192.168.X.X (The X will be a ip address) it means its not your external ip and for some reasion your browser is trying to report the wrong address, you can also view your external address at https://www.whatismyip.com/
Also of Note: You may see diferant IP's above as our Sites have IPv6 enabeled and so one ip could be IPv6 and the other IPv4.
The browser you clame to be using is " CCBot/2.0 (https://commoncrawl.org/faq/) "
What this means is we have put in place some high security function on our websites that block some site access and/or some IP's and even Countries out right.
If you think you was blocked mistakenly then please email our webadmin support via 403error@arthc.com.au,
Please note you must state your true IP's as well as the ones above, also what time you tried to access and the country, then we will look into it asap and fix the problem if there is a reason to fix it.
Many Ip's and Countries will not be unblocked without good reason as the Australian Road Transport Heritage Centre website is mostly for Australian's or people in Australia.
These functions are in place to help protect our websites and equipment from Spammers &/or Hackers and yes many are trying.
Our Webadmin support company website is at www.haddow.net.au