[CentOS] What can I do to UNDERSTAND why I can't reach centos.org (but everyone else can)?

Fri Mar 1 16:19:56 UTC 2013
Rock <RockSockDoc at gmail.com>

>> try a traceroute to tempotv.com.tr,
>> which takes 23 hops from my computer.

For the record, I was unable to get to any of these long-hop destinations:
$ traceroute tempotv.com.tr ==> died on the 23rd hop 
$ traceroute -I www.centos.org ==> died on the 19th (penultimate) hop
$ traceroute www.gu.ac.ir ==> Iran, died on the 22nd hop
$ traceroute www.gu.edu.pk ==> Pakistan, made it only to the 19th hop
$ traceroute -m 255 www.tourism.gov.my ==> Malaysia died on the 19th hop

All the above died before reaching their destinations.