Bind problem

[by_maximus]

root@server:/etc/bind# netstat -tlnp | grep named
tcp 0 0 127.0.0.1:953 0.0.0.0:* OUÇA 1
7757/named
tcp 0 0 10.1.229.12:53 0.0.0.0:* OUÇA 1
7757/named
tcp 0 0 10.1.229.11:53 0.0.0.0:* OUÇA 1
7757/named
tcp 0 0 174.142.73.187:53 0.0.0.0:* OUÇA 1
7757/named
tcp 0 0 127.0.0.1:53 0.0.0.0:* OUÇA 1
7757/named
tcp6 0 0 ::1:953 :::* OUÇA 1
7757/named
tcp6 0 0 :::53 :::* OUÇA 1
7757/named


the panel this configured for the IP 174.142.73.186 and why bind this only twirling in the 187?