Someone

iwlist eth1 scan
eth1      Scan completed :
          Cell 01 - Address: 00:14:BF:BA:54:29
                    ESSID:"Valera-Wireless-Service-STA2"
                    Protocol:IEEE 802.11b
                    Mode:Master
                    Channel:7
                    Encryption key:off
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                    Quality=100/100  Signal level=-75 dBm  
                    Extra: Last beacon: 3552ms ago
          Cell 02 - Address: 00:13:10:18:34:49
                    ESSID:"Zamuro1"
                    Protocol:IEEE 802.11b
                    Mode:Master
                    Channel:14
                    Encryption key:off
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                    Quality=100/100  Signal level=-84 dBm  
                    Extra: Last beacon: 636ms ago
          Cell 03 - Address: 00:16:B6:06:83:FC
                    ESSID:"PCI-SEDE.NET"
                    Protocol:IEEE 802.11b
                    Mode:Master
                    Channel:14
                    Encryption key:off
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                    Quality=100/100  Signal level=-81 dBm  
                    Extra: Last beacon: 372ms ago
          Cell 04 - Address: 00:0E:2E:93:38:5B
                    ESSID:"INTERCONEX-VAL"
                    Protocol:IEEE 802.11bg
                    Mode:Master
                    Channel:7
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Quality=100/100  Signal level=-84 dBm  
                    Extra: Last beacon: 3544ms ago