странно при пинг

64 bytes from 194.145.63.12: icmp_seq=467 ttl=59 time=1.16 ms
64 bytes from 194.145.63.12: icmp_seq=468 ttl=59 time=4.70 ms
64 bytes from dir.bg (194.145.63.12): icmp_seq=469 ttl=59 time=1.72 ms
64 bytes from dir.bg (194.145.63.12): icmp_seq=470 ttl=59 time=2.82 ms
...
...
64 bytes from dir.bg (194.145.63.12): icmp_seq=477 ttl=59 time=1.13 ms
64 bytes from 194.145.63.12: icmp_seq=478 ttl=59 time=5.88 ms
64 bytes from 194.145.63.12: icmp_seq=479 ttl=59 time=1.08 ms
...
64 bytes from dir.bg (194.145.63.12): icmp_seq=521 ttl=59 time=1.14 ms
...
...
...
64 bytes from dir.bg (194.145.63.12): icmp_seq=529 ttl=59 time=1.06 ms
64 bytes from 194.145.63.12: icmp_seq=530 ttl=59 time=1.04 ms
64 bytes from 194.145.63.12: icmp_seq=531 ttl=59 time=1.12 ms
...
...
...

Та въпроса е следния - има ли причина част от reply-tata да съдържат host (IP), a останалите - само IP

linux-a е ubuntu 2.6.24-16-server