How to let internet can resolve PTR record?

Hello,
I know imscp can't add PTR record.So I edit some conf file.

Quote

/etc/bind/named.conf.local
add it:

zone "99.135.140.in-addr.arpa" {
type master;
file "/var/cache/bind/140.135.99.db";
allow-transfer { localhost; };
notify yes;
};

/etc/imscp/bind/working/named.conf.local

add it:

zone "99.135.140.in-addr.arpa" {
type master;
file "/var/cache/bind/140.135.99.db";
allow-transfer { localhost; };
notify yes;
};

/var/cache/bind/140.135.99.db

add it:

$ORIGIN .
$TTL 10800 ; 3 hours
99.135.140.in-addr.arpa IN SOA ns1.da.cycu.edu.tw. hostmaster.da.cycu.edu.tw. (
2016051809 ; serial
10800 ; refresh (3 hours)
3600 ; retry (1 hour)
1209600 ; expire (2 weeks)
3600 ; minimum (1 hour)
)
NS ns1.da.cycu.edu.tw.
$ORIGIN 99.135.140.in-addr.arpa.
** IN PTR da.cycu.edu.tw.

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I add it finish.And restart bind service.I test localhost PTR.

Quote

nslookup
> server
Default server: 127.0.0.1
Address: 127.0.0.1#53
> IP
Server: 127.0.0.1
Address: 127.0.0.1#53

IP.in-addr.arpa name = da.cycu.edu.tw.

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But it's can't resolve if use internet dns server.

Quote

> server 168.95.1.1
Default server: 168.95.1.1
Address: 168.95.1.1#53
> IP
Server: 168.95.1.1
Address: 168.95.1.1#53

** server can't find IP.in-addr.arpa.: NXDOMAIN

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How to fix it?

OK,I know,Thanks a lot.