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    Cordless phones, also known as cordless telephones or portable telephones, are a smarter replacement for the regular telephones. Cordless phones make use of wireless radio waves to connect to their base station equipments, unlike the wired cord of a regular telephone.

    Because cordless handsets use radio linking with their base stations, they operate within specific ranges of frequencies. The range of connectivity is quite limited – maybe inside the house or to few adjacent floors. The base station requires power supply to charge the internally fitted rechargeable battery.

    The term frequency refers to the rate at which an electromagnetic wave oscillates. Therefore, most cordless phone models are allotted specific range of frequencies within which they operate. A cordless handset and and a base station communicates with each other using this frequency.

    Here are the frequencies for the first generation 46/49MHz cordless phones.

    Channel Handset Frequency Base Frequency
    1 49.670 46.610
    2 49.845 46.630
    3 49.860 46.670
    4 49.770 46.710
    5 49.875 46.730
    6 49.830 46.770
    7 49.890 46.830
    8 49.930 46.870
    9 49.990 46.930
    10 49.970 46.970

    900MHz Cordless Phone Frequencies

    Second generation 900MHz cordless phones have been allocated the frequencies between 902 and 928MHz, with channel spacing between 30-100KHz.

    The following are some examples of the frequencies that example cordless phones use:

    Panasonic KX-T9000 (60 Channels) Base Frequency: 902.100 – 903.870 Handset Frequency: 926.100 – 927.870

    Channel Base Frequency Handset Frequency Channel Base Frequency Handset Frequency
    01 902.100 926.100 31 903.000 927.000
    02 902.130 926.130 32 903.030 927.030
    03 902.160 926.160 33 903.060 927.060
    04 902.190 926.190 34 903.090 927.090
    05 902.220 926.220 35 903.120 927.120
    06 902.250 926.250 36 903.150 927.150
    07 902.280 926.280 37 903.180 927.180
    08 902.310 926.310 38 903.210 927.210
    09 902.340 926.340 39 903.240 927.240
    10 902.370 926.370 40 903.270 927.270
    11 902.400 926.400 41 903.300 927.300
    12 902.430 926.430 42 903.330 927.330
    13 902.460 926.460 43 903.360 927.360
    14 902.490 926.490 44 903.390 927.390
    15 902.520 926.520 45 903.420 927.420
    16 902.550 926.550 46 903.450 927.450
    17 902.580 926.580 47 903.480 927.480
    18 902.610 926.610 48 903.510 927.510
    19 902.640 926.640 49 903.540 927.540
    20 902.670 926.670 50 903.570 927.570
    21 902.700 926.700 51 903.600 927.600
    22 902.730 926.730 52 903.630 927.630
    23 902.760 926.760 53 903.660 927.660
    24 902.790 926.790 54 903.690 927.690
    25 902.820 926.820 55 903.720 927.720
    26 902.850 926.850 56 903.750 927.750
    27 902.880 926.880 57 903.780 927.780
    28 902.910 926.910 58 903.810 927.810
    29 902.940 926.940 59 903.840 927.840
    30 902.970 926.970 60 903.870 927.870

    GE model 26938GE1-C

    Channel Base Frequency Handset Frequency Channel Base Frequency Handset Frequency
    01 923.7 925.9 21 924.7 926.9
    02 923.8 925.95 22 924.75 926.95
    03 923.8 926.0 23 924.8 927.0
    04 923.85 926.05 24 924.85 927.05
    05 923.9 926.1 25 924.9 927.1
    06 923.95 926.15 26 924.95 927.15
    07 924.0 926.2 27 925.0 927.2
    08 924.05 926.25 28 925.05 927.25
    09 924.1 926.4 29 925.1 927.3
    10 924.15 926.35 30 925.15 927.35
    11 924.2 926.4 31 925.2 927.4
    12 924.25 926.45 32 925.25 927.45
    13 924.3 926.5 33 925.3 927.5
    14 924.35 926.55 34 925.35 927.55
    15 924.4 926.6 35 925.4 927.6
    16 924.45 926.65 36 925.45 927.65
    17 924.5 926.7 37 925.5 927.7
    18 924.55 926.75 38 925.55 927.75
    19 924.6 926.8 39 925.6 927.8
    20 924.65 926.85 40 925.65 927.85

    V-Tech Tropez DX900 (20 Channels)

    Base Frequency: 905.6 – 907.5 (100Khz spacing), Handset Frequency: 925.5 – 927.4

    Channel Base Frequency Handset Frequency Channel Base Frequency Handset Frequency
    01 905.600 925.500 11 906.600 926.500
    02 905.700 925.600 12 906.700 926.600
    03 905.800 925.700 13 906.800 926.700
    04 905.900 925.800 14 906.900 926.800
    05 906.000 925.900 15 907.000 926.900
    06 906.100 926.000 16 907.100 927.000
    07 906.200 926.100 17 907.200 927.100
    08 906.300 926.200 18 907.300 927.200
    09 906.400 926.300 19 907.400 927.300
    10 906.500 926.400 20 907.500 927.400

    Other 900MHz cordless phones:

    AT&T #9120 902.0 – 905.0 & 925.0 – 928.0 MHz
    Otron Corp. #CP-1000 902.1 – 903.9 & 926.1 – 927.9 MHz
    Samsung #SP-R912 903.0 & 927.0 MHz

    2.4GHz Cordless Phone Frequencies

    Third generation 2.4GHz cordless phones have been allocated the frequencies between 2.4Ghz and 2.4835Ghz, with a channel spacing of 5MHz.

    The 2.4GHz cordless phone frequencies are shared with 802.11b and 802.11g wireless networks.

    5.8GHz Cordless Phone Frequencies

    Fourth generation 5.8GHz cordless phones have been allocated the frequencies between 5.725Ghz and 5.850Ghz.

    It is important to note that some 5.8GHz cordless phones use the 5.8Ghz frequencies only for base-to-handset transmissions, while still using the 2.4Ghz frequencies for handset to base transmissions.

    This split frequency technique saves battery life on the cordless phone handset because it requires more power to transmit at the higher 5.8GHz frequency than at the lower 2.4Ghz frequency.

    The 5.8GHz cordless phone frequencies are shared with 802.11a wireless networks.

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    7 comments
    1. Fred

      31 August, 2013 at 12:11 pm

      to scan a cordless phone do you need t program the base frequency into the scanner as well as the handset frequency or just the handset frequency?

      Reply
      • WillSpencer

        31 August, 2013 at 1:36 pm

        You’ll want to monitor both frequencies if you want to hear both sides of the conversation.

        Reply
    2. Don

      23 May, 2012 at 1:17 pm

      Danny,

      If you go to the FCC website and look for FCC ID number identification, it will give you the specs on the Panasonic device. I believe you will find that: 1. your scanner won’t go that high, 2. the device is not analog but digital modulation which scanners won’t demodulate, and 3. the device also frequency-hops meaning your scanner couldn’t “lock” on it and stay with it anyway. Sorry, but that is the current state of the art these days.

      Reply
    3. John Casey

      18 November, 2011 at 10:00 pm

      I need to find out the frequencys of the base and handset for a Panasonic cordless telephone model KX-TC 1484B.
      Could you please E Mail the list if you have it.
        Thank you
        John

      Reply
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