Probably a firewall blocking ping and/or traceroute UDP ports or an access-list on a router. Non-necessarily censorship...try a telnet on port 80 to the IP.
telnet on port 80 failed. I pinged from nwtools.com outside the local network. I used to work for a hosting company and watched the governments of Thailand, Vietnam and the like do the same thing to sites they deemed subversive. I just didn’t think it was going on here in the Good Old USA.