To z pewnoscia nie jest problem polskiego Internetu, ale:

$ host -t ns -v news.neostrada.pl. a-dns.pl.
;; AUTHORITY SECTION:
neostrada.pl. 86400 IN NS ns2.hosting.tp.pl.
neostrada.pl. 86400 IN NS ns1.hosting.tp.pl.

$ host -t ns -v ns2.hosting.tp.pl. a-dns.pl.
;; AUTHORITY SECTION:
tp.pl. 86400 IN NS ns1.tpnet.pl.
tp.pl. 86400 IN NS ns2.tpnet.pl.
tp.pl. 86400 IN NS ns3.tpnet.pl.

$ host -t ns -v ns2.hosting.tp.pl. ns1.tpnet.pl.
;; AUTHORITY SECTION:
hosting.tp.pl. 86400 IN NS ns1.hosting.tp.pl.
hosting.tp.pl. 86400 IN NS ns2.hosting.tp.pl.

;; ADDITIONAL SECTION:
ns1.hosting.tp.pl. 86400 IN A 193.110.120.122
ns2.hosting.tp.pl. 86400 IN A 193.110.120.125

$ host -v news.neostrada.pl. ns1.hosting.tp.pl.
Trying "news.neostrada.pl"
;; connection timed out; no servers could be reached

$ host -v news.neostrada.pl. ns2.hosting.tp.pl.
Trying "news.neostrada.pl"
;; connection timed out; no servers could be reached

193.110.120.122 vs 193.110.120.125 - ciekawe jak daleko od siebie
stoja te dwie maszyny.

10. z-war-r3-do-war-ar2.tpnet.pl 0.0% 124.9 39.6 28.6 199.7 31.6
11. 80.50.235.98 0.0% 28.8 28.8 28.6 28.9 0.1
12. 193.110.120.122 0.0% 29.0 29.0 28.8 31.4 0.4

10. z-war-r3-do-war-ar2.tpnet.pl 0.0% 28.9 28.8 28.8 28.9 0.1
11. 80.50.235.98 0.0% 28.7 28.7 28.7 28.8 0.1
12. 193.110.120.125 0.0% 28.9 29.2 28.9 29.6 0.5

Chociaz w sumie... znam czlowieka, ktory stawia DNSy na roznych
adresach tej samej maszyny, tu chyba tak nie jest?
--
Krzysztof Halasa