DNS, сервер имен и домен на одном выделенном IP - запись PTR для сервера имен?

Мой выделенный IP: xx.xxx.xxx.59

Правильно ли я делаю это, имея 2 записи PTR (ns1 и домен) для моего IP-адреса?

Файл обратной зоны DNS 59.xxx.xxx.xx.in-addr.arpa.db

$TTL 86400
@       IN      SOA     ns1.example.com. admin.example.com. (
         2020040201     ; Serial
               3600     ; Refresh
               7200     ; Retry
            1209600     ; Expire
              86400 )   ; Negative Cache TTL

@       IN      NS              ns1.example.com.
@       IN      NS              ns2.example.com.

;Reverse lookup for Name Server
59      IN      PTR             ns1.example.com.

;PTR Record IP address to HostName
59      IN      PTR             example.com.

И моя настоящая зона DNS:

$TTL 86400
@       IN      SOA     ns1.example.com. admin.example.com. (
         2020040201     ; Serial
               3600     ; Refresh
               7200     ; Retry
            1209600     ; Expire
              86400 )   ; Negative Cache TTL

; name servers - NS records
@       IN      NS              ns1.example.com.
@       IN      NS              ns2.example.com.

; name servers - A records
ns1.example.com.     IN      A               xx.xxx.xxx.59
ns2.example.com.     IN      A               xx.xxx.xxx.59

; All other A records
@       IN      A               xx.xxx.xxx.59
mail    IN      A               xx.xxx.xxx.59
www     IN      A               xx.xxx.xxx.59
@       IN      MX      10      mail.example.com.
@       IN      TXT             "v=spf1 a mx ip4:xx.xxx.xxx.59 ?all"

И мой /etc/ named.conf

options {
        listen-on port 53 { 127.0.0.1; xx.xxx.xxx.59; };
#       listen-on-v6 port 53 { ::1; };
        directory       "/var/named";
        dump-file       "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
        recursing-file  "/var/named/data/named.recursing";
        secroots-file   "/var/named/data/named.secroots";
        allow-query     { localhost; xx.xxx.xxx.0/24};

        recursion no;

        dnssec-enable yes;
        dnssec-validation yes;
        bindkeys-file "/etc/named.root.key";
        managed-keys-directory "/var/named/dynamic";
        pid-file "/run/named/named.pid";
        session-keyfile "/run/named/session.key";
};

logging {
        channel default_debug {
                file "data/named.run";
                severity dynamic;
        };
};

zone "." IN {
        type hint;
        file "named.ca";
};

include "/etc/named.rfc1912.zones";
include "/etc/named.root.key";

zone "example.com" {type master; file "/var/named/example.com.db";};
zone "59.xxx.xxx.xx.in-addr.arpa" {type master; file "/var/named/59.xxx.xxx.xx.in-addr.arpa.db";};