Internet Unknown (28)

[Rasheed Darras]

I have snoop my DNS traffic and found many queries with "Internet Unknown
(28)" :-

##################################
212.93.192.4 -> 207.35.85.50 DNS C ns1.nrjdesign.net. Internet Unknown (28)
?
86.60.68.221 -> 212.93.192.4 DNS C switchboard.real.com. Internet Unknown
(28) ?
86.60.52.183 -> 212.93.192.4 DNS C rds.yahoo.com. Internet Unknown (28) ?
86.60.80.172 -> 212.93.192.4 DNS C www.mafyny.com. Internet Unknown (28) ?
212.100.212.214 -> 212.93.192.4 DNS C www.17tahun.com. Internet Unknown (28)
?
84.22.253.230 -> 212.93.192.4 DNS C ads.net-ad-vantage.com. Internet Unknown
(28) ?
218.186.1.56 -> 212.93.192.4 DNS C ns1.awalnet.net.sa. Internet Unknown (28)
?
86.60.90.151 -> 212.93.192.4 DNS C rad.msn.com. Internet Unknown (28) ?
218.186.1.56 -> 212.93.192.4 DNS C ns2.awalnet.net.sa. Internet Unknown (28)
?
212.93.218.115 -> 212.93.192.4 DNS C kanoosa.com. Internet Unknown (28) ?
86.60.79.207 -> 212.93.192.4 DNS C www.rayzah.com. Internet Unknown (28) ?
212.93.192.4 -> 208.64.29.67 DNS C rayzah.com. Internet Unknown (28) ?
212.116.222.30 -> 212.93.192.4 DNS C by5.omega.contacts.msn.com. Internet
Unknown (28) ?
212.93.192.4 -> 218.32.192.60 DNS C p1.coowo.com. Internet Unknown (28) ?
  61.69.12.2 -> 212.93.192.4 DNS C almozoon.com. Internet Unknown (28) ?
212.116.222.30 -> 212.93.192.4 DNS C by5.omega.contacts.msn.com. Internet
Unknown (28) ?
212.93.192.4 -> 61.151.254.2 DNS C ns.shanda.com.cn. Internet Unknown (28) ?
86.60.80.172 -> 212.93.192.4 DNS C upload.arb7.com. Internet Unknown (28) ?
213.184.171.133 -> 212.93.192.4 DNS C www.skaau.com. Internet Unknown (28) ?
193.239.242.2 -> 212.93.192.4 DNS C ns1.awalnet.net.sa. Internet Unknown
(28) ?
193.239.242.2 -> 212.93.192.4 DNS C ns2.awalnet.net.sa. Internet Unknown
(28) ?
 86.60.3.208 -> 212.93.192.4 DNS C www.m5zn.com. Internet Unknown (28) ?
86.60.104.113 -> 212.93.192.4 DNS C rad.msn.com. Internet Unknown (28) ?
86.60.68.221 -> 212.93.192.4 DNS C guide.real.com. Internet Unknown (28) ?
212.93.192.4 -> 207.188.22.20 DNS C guide-web.real.com. Internet Unknown
(28) ?
##################################


Is this related EDNS queries? And how I solve it?
My Bind version 9.3.0...

Rasheed
Anet