dmesg
[  209.525013] cfg80211: Using static regulatory domain info
[  209.525015] cfg80211: Regulatory domain: US
[  209.525017] 	(start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[  209.525019] 	(2402000 KHz - 2472000 KHz @ 40000 KHz), (600 mBi, 2700 mBm)
[  209.525022] 	(5170000 KHz - 5190000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
[  209.525024] 	(5190000 KHz - 5210000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
[  209.525027] 	(5210000 KHz - 5230000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
[  209.525029] 	(5230000 KHz - 5330000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
[  209.525031] 	(5735000 KHz - 5835000 KHz @ 40000 KHz), (600 mBi, 3000 mBm)
[  209.525038] cfg80211: Calling CRDA for country: US
[  209.632383] iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, 1.3.27ks
[  209.632386] iwlagn: Copyright(c) 2003-2009 Intel Corporation

lsmod | grep iwl
iwlagn                 73139  0 
iwlcore                77842  1 iwlagn
mac80211              137356  2 iwlagn,iwlcore
led_class               2433  1 iwlcore
cfg80211              101496  3 iwlagn,iwlcore,mac80211

iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

vboxnet0  no wireless extensions.

pan0      no wireless extensions.