Через dig и nslookup работает, через host у меня тоже не работает (freebsd9).
mail# nslookup
> server f.root-servers.net
Default server: f.root-servers.net
Address: 192.5.5.241#53
Default server: f.root-servers.net
Address: 2001:500:2f::f#53
> set q=ns
> ru.
Server: f.root-servers.net
Address: 192.5.5.241#53
Non-authoritative answer:
*** Can't find ru.: No answer
Authoritative answers can be found from:
ru nameserver = e.dns.ripn.net.
ru nameserver = a.dns.ripn.net.
ru nameserver = d.dns.ripn.net.
ru nameserver = b.dns.ripn.net.
ru nameserver = f.dns.ripn.net.
a.dns.ripn.net internet address = 193.232.128.6
b.dns.ripn.net internet address = 194.85.252.62
d.dns.ripn.net internet address = 194.190.124.17
e.dns.ripn.net internet address = 193.232.142.17
f.dns.ripn.net internet address = 193.232.156.17
a.dns.ripn.net has AAAA address 2001:678:17:0:193:232:128:6
b.dns.ripn.net has AAAA address 2001:678:16:0:194:85:252:62
d.dns.ripn.net has AAAA address 2001:678:18:0:194:190:124:17
e.dns.ripn.net has AAAA address 2001:678:15:0:193:232:142:17
f.dns.ripn.net has AAAA address 2001:678:14:0:193:232:156:17
Зато с ключом -v прекрасно работает
mail# host -v -t ns ru. f.root-servers.net
Trying "ru"
Using domain server:
Name: f.root-servers.net
Address: 192.5.5.241#53
Aliases:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 435
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 10
;; QUESTION SECTION:
;ru. IN NS
;; AUTHORITY SECTION:
ru. 172800 IN NS f.dns.ripn.net.
ru. 172800 IN NS a.dns.ripn.net.
ru. 172800 IN NS e.dns.ripn.net.
ru. 172800 IN NS d.dns.ripn.net.
ru. 172800 IN NS b.dns.ripn.net.
;; ADDITIONAL SECTION:
a.dns.ripn.net. 172800 IN A 193.232.128.6
b.dns.ripn.net. 172800 IN A 194.85.252.62
d.dns.ripn.net. 172800 IN A 194.190.124.17
e.dns.ripn.net. 172800 IN A 193.232.142.17
f.dns.ripn.net. 172800 IN A 193.232.156.17
a.dns.ripn.net. 172800 IN AAAA 2001:678:17:0:193:232:128:6
b.dns.ripn.net. 172800 IN AAAA 2001:678:16:0:194:85:252:62
d.dns.ripn.net. 172800 IN AAAA 2001:678:18:0:194:190:124:17
e.dns.ripn.net. 172800 IN AAAA 2001:678:15:0:193:232:142:17
f.dns.ripn.net. 172800 IN AAAA 2001:678:14:0:193:232:156:17
Received 332 bytes from 192.5.5.241#53 in 64 ms
mail#