Server Domain Connection Issue

Hi,

My minecraft server with the domain opanarchy.com is having issues registering. I have looked up the domain and it shows that it has been potentially blacklisted recently?

Please could you look into this for me and let me know? I don't understand as the server has not been active for over 4 months and has been running since 2013. Please could you get back to me at your earliest convenience?

Kind Regards,