yury@ThinkPad-T500:~$ host -a altlinux.ru
Trying "altlinux.ru"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 851
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;altlinux.ru.                   IN      ANY

;; ANSWER SECTION:
altlinux.ru.            86400   IN      SOA     ns0.altlinux.org. hostmaster.altlinux.ru. 2011020301 43200 3600 2419200 3600
altlinux.ru.            86400   IN      NS      ns1.altlinux.org.
altlinux.ru.            86400   IN      NS      ns0.altlinux.org.
altlinux.ru.            86400   IN      A       194.107.17.163
altlinux.ru.            86400   IN      MX      10 smtp.altlinux.org.

yury@ThinkPad-T500:~$ host -a smtp.altlinux.org
Trying "smtp.altlinux.org"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13599
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;smtp.altlinux.org.             IN      ANY

;; ANSWER SECTION:
smtp.altlinux.org.      86400   IN      A       194.107.17.36

;; AUTHORITY SECTION:
altlinux.org.           20960   IN      NS      ns0.altlinux.org.
altlinux.org.           20960   IN      NS      ns1.altlinux.org.

;; ADDITIONAL SECTION:
ns0.altlinux.org.       33495   IN      A       194.107.17.4
ns1.altlinux.org.       33495   IN      A       91.213.195.97

yury@ThinkPad-T500:~$ host -a 194.107.17.36
Trying "36.17.107.194.in-addr.arpa"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41782
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;36.17.107.194.in-addr.arpa.    IN      PTR

;; ANSWER SECTION:
36.17.107.194.in-addr.arpa. 86400 IN    PTR     smtp.altlinux.org.

;; AUTHORITY SECTION:
17.107.194.in-addr.arpa. 86400  IN      NS      ns0.altlinux.org.
17.107.194.in-addr.arpa. 86400  IN      NS      ns1.altlinux.org.

;; ADDITIONAL SECTION:
ns0.altlinux.org.       33464   IN      A       194.107.17.4
ns1.altlinux.org.       33464   IN      A       91.213.195.97