Netstat mysteries

franz:<squid> # netstat -AN -f inet6 | grep 3128
tcp6       0      0  *.3128                 *.*                    LISTEN
franz:<squid> # netstat -AN -f inet6 | grep 822
tcp6       0      0  *.822                  *.*                    LISTEN
franz:<squid> # netstat -AN -f inet | grep 822
tcp        0     48  78.47.36.230.822       85.127.248.47.40644    ESTABLISHED
tcp        0      0  78.47.36.230.822       85.127.248.47.40639    ESTABLISHED
tcp        0      0  *.822                  *.*                    LISTEN
franz:<squid> # netstat -AN -f inet | grep 3128