Here's the frequencies for the new cordless phones.  You 
can set the channels up on most scanners so you can listen in on 
the neighborhood gossip, etc...

CHANNEL          BASE            HANDSET

1
46.61O
49.670

2
46.63O
49.845

3
46.670
49.860

4
46.710
49.770

5
46.730
49.875

6
46.770
49.830

7
46.830
49.890

8
46.870
49.930

9
46.930
49.990

10
46.970
46.970

You should be able to hear both sides of the conversation on 
either the base or handset frequencies due to the telephone hybrid 
circuitry.
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By the way, those order-taking boxes you see at some McDonald's
and Jack-in-the-Box drive-thru restaurants...you will find them 
operating simplex on one or more of the following frequencies:

               35.020

             154.570

             154.600

             157.595                                                                 
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Those cute little wireless microphones you see professional 
singers using?  Snoop around:

36.70

37.10     These aren't the cheap Radio Shack

37.16     variety of wireless mike - they're the

40.68     expensive, professional variety...

42.89

44.87

47.27
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All frequencies are in megahertz and are shared with other low power, 
short range utility services, so you may hear some strange things 
depending upon your location and antenna.                                                
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Keep in mind that it may be unlawful for you to divulge certain 
information you hear on your scanner.