curl, wget do not return anything

I am trying this curl -I zomato.com | head -n 1 and I am not getting any response. % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 0 0 0 0 0 0 0 0 --:- -:-- 0:05:29 --:- -:-- 0 Is the site protected by firewalls? Even wget is not working on the site as well. Other sites like google.com are returning 200 response as expected.