8.8.8.8 google-public-dns-a.google.com can't find ... Non-existent domain

[d.te...@gmail.com]

Hello,

1-  8.8.8.8 can resolve;

nslookup www.guncelyazilim.com.tr 8.8.8.8

Server:  google-public-dns-a.google.com

Address:  8.8.8.8

Non-authoritative answer:

Name:    www.guncelyazilim.com.tr

2-  8.8.8.8 can also resolve;

nslookup  portal.guncelyazilim.com.tr 8.8.8.8

Server:  google-public-dns-a.google.com

Address:  8.8.8.8

Non-authoritative answer:

Name:    portal.guncelyazilim.com.tr

Address:  78.189.215.147

3- but Problem is in record :

nslookup  support.guncelyazilim.tr 8.8.8.8

Server:  google-public-dns-a.google.com

Address:  8.8.8.8

*** google-public-dns-a.google.com can't find support.kendinyonet.com: Non-existent domain

My domain Info;

nslookup -type=SOA guncelyazilim.com.tr

.......

Non-authoritative answer:

guncelyazilim.com.tr

        primary name server = ns1.sadecehosting.com

        responsible mail addr = sysadm.sadecehosting.com

        serial  = 2015102611

        refresh = 10800 (3 hours)

        retry   = 3600 (1 hour)

        expire  = 1209600 (14 days)

        default TTL = 3600 (1 hour)

ns1.sadecehosting.com   internet address = 77.92.152.10

what is the problem?

Thanks in advance.

best regards

[Shen Wan]

The authoritative nameserver ns1.nic.tr returns NXDOMAIN for support.guncelyazilim.tr