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Very Low Frequency

9 - 30 kHz
  • Cable locating equipment [15.213]
  • Power line carrier systems (operated by a power utility for general supervision of the power system) [15.113]

    • Low Frequency

    30 - 70 kHz
  • Cable locating equipment [15.213]
  • Power line carrier systems (operated by a power utility for general supervision of the power system) [15.113]
  • 60 kHz - Radio station WWVB (time and frequency signals)
    • 70 - 90 kHz
  • Cable locating equipment [15.213]
  • Radiolocation, land or mobile [Part 90 Subpart F]
  • International Fixed Service
  • Maritime Mobile Service
  • Power line carrier systems (operated by a power utility for general supervision of the power system) [15.113]
    • 90 - 110 kHz
  • LORAN-C navigation system
  • Cable locating equipment [15.213]
  • 101.4 kHz - Transmitters used to detect buried electronic markers used by telephone companies [15.205(d)(2)]
  • Radiolocation, land [Part 90]
  • Power line carrier systems (operated by a power utility for general supervision of the power system) [15.113]
    • 110 - 130 kHz
  • Cable locating equipment [15.213]
  • Radiolocation, land or mobile [Part 90 Subpart F]
  • Power line carrier systems (operated by a power utility for general supervision of the power system) [15.113]
  • International Fixed Service
  • Maritime Mobile Service
    • 130 - 160 kHz
  • Cable locating equipment [15.213]
  • Power line carrier systems (operated by a power utility for general supervision of the power system) [15.113]
    • 160 - 190 kHz
  • Cable locating equipment [15.213]
  • Intentional radiators, 1 watt max. [15.217]
  • Power line carrier systems (operated by a power utility for general supervision of the power system) [15.113]
    • 190 - 200 kHz
  • Radiobeacons for aircraft navigation [Part 87]
  • Cable locating equipment [15.213]
    • 200 - 285 kHz
  • Radiobeacons for aircraft navigation [Part 87]
  • Air traffic control [Part 87]
  • Cable locating equipment [15.213]
    • 285 - 325 kHz
  • Marine Radiobeacons
  • Cable locating equipment [15.213]
  • Power line carrier systems (operated by a power utility for general supervision of the power system) [15.113]

    • Medium Frequency

    325 - 405 kHz
  • Radiobeacons for aircraft navigation [Part 87]
  • Air traffic control [Part 87]
  • Cable locating equipment [15.213]
  • Power line carrier systems (operated by a power utility for general supervision of the power system) [15.113]
    • 405 - 435 kHz
  • Radiobeacons for aircraft navigation [Part 87]
  • Cable locating equipment [15.213]
  • Power line carrier systems (operated by a power utility for general supervision of the power system) [15.113]
    • 435 - 490 kHz
  • Cable locating equipment [15.213]
  • Power line carrier systems (operated by a power utility for general supervision of the power system) [15.113]
  • 457 kHz
    • 500 kHz
  • International calling and distress frequency for ships and aircraft over the high seas
    • 510 - 525 kHz
  • Radiobeacons for aircraft navigation
  • Intentional radiators, 100 milliwatts max. [15.219]
    • 525 - 535 kHz
  • Intentional radiators, 100 milliwatts max. [15.219]
  • Carrier current broadcasting [15.221]
  • Travelers' Information Stations, 530 through 1700 kHz in 10 kHz increments [90.242]
    • 535 - 1705 kHz
  • AM broadcast [Part 73 Subpart A]
  • Intentional radiators, 100 milliwatts max. [15.219]
  • Carrier current broadcasting [15.221]
  • Travelers' Information Stations, 530 through 1700 kHz in 10 kHz increments [90.242]
  • 1630 kHz, Public Safety, Fire, Base or mobile [90.20]
  • 1638 kHz, Aeronautical Radionavigation Service
  • 1605 - 1705 kHz, Radiolocation, no new assignments after September 30, 1985 [Part 90 Subpart F]
    • 1705 - 1750 kHz
  • Radiolocation [Part 90 Subpart F]
  • 1708 kHz, Aeronautical Radionavigation Service
  • 1722 kHz, Public Safety, Police, Base or mobile[90.20]
  • 1730 kHz, Public Safety, Police, Base or mobile[90.20]
    • 1750 - 1800 kHz
  • Radiolocation [Part 90 Subpart F]
  • Disaster Communications Service [90.103(c)(7)]
    • 1800 - 1900 kHz
  • Amateur (160 meter band) [Part 97]
    • 1900 - 1950 kHz
  • Amateur (160 meter band) [Part 97]
  • Radiolocation [Part 90 Subpart F]
    • 1950 - 2000 kHz
  • Amateur (160 meter band) [Part 97]
  • Radiolocation [Part 90 Subpart F]
    • 2003 kHz
  • Maritime SSB Radiotelephone [80.373] - Intership Safety and Operational - Great Lakes only
    • Gap in list
    2065 kHz
  • Maritime SSB Radiotelephone [80.373] - Business and Operational - All Areas.
    • Gap in list
    2079 kHz
  • Maritime SSB Radiotelephone [80.373] - Business and Operational - All Areas.
    • 2082.5 kHz
  • Maritime SSB Radiotelephone [80.373] - Intership Safety and Operational - All Areas. Also, intership non-commercial fishing.
    • Gap in list
    2093 kHz
  • Maritime SSB Radiotelephone [80.373] - Intership Safety and Operational - All Areas.
    • 2096.5 kHz
  • Maritime SSB Radiotelephone [80.373] - Business and Operational - All Areas.
    • Gap in list
    2142 kHz
  • Maritime SSB Radiotelephone [80.373] - Intership Safety and Operational - Pacific Coast, daily, south of 42 deg. N
    • Gap in list
    2182 kHz
  • Maritime SSB Radiotelephone [80.373] - Intership Safety and Operational - Distress, safety and calling
    • 2187.5 kHz
  • Digital Selective Calling (DSC) channel [part of Global Maritime Distress and Safety System (GMDSS)]
    • Gap in list
    2203 kHz
  • Maritime SSB Radiotelephone [80.373] - Intership Safety and Operational - Gulf of Mexico. Also, intership non-commercial fishing.
    • Gap in list
    2214 kHz
  • Maritime SSB Radiotelephone [80.373] - Intership Safety and Operational - All Areas.
    • Gap in list
    2500 kHz
  • Time and frequency broadcasts, WWV and WWVH
    • Gap in list
    2638 kHz
  • Maritime SSB Radiotelephone [80.373] - Intership Safety and Operational - All Areas.
    • Gap in list
    2670 kHz
  • Maritime SSB Radiotelephone [80.373] - Intership Safety and Operational - U.S. Coast Guard Liaison and Maritime Safety Broadcasts
    • Gap in list
    2738 kHz
  • Maritime SSB Radiotelephone [80.373] - Intership Safety and Operational - All Areas, except Great Lakes.
    • Gap in list
    2830 kHz
  • Maritime SSB Radiotelephone [80.373] - Intership Safety and Operational - Gulf of Mexico only.
    • Gap in list
    2851 kHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list

    High Frequency

    Gap in list
    3.004 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    3.023 MHz
  • Maritime SSB Radiotelephone [80.373] - Business and Operational - Government shore, ship and aircraft stations for search and rescue coordination.
    • Gap in list
    3.23 - 3.40 MHz
  • Radiolocation, associated with 1605 - 1800 kHz, secondary to other services [Part 90 Subpart F]
  • 3.281 MHz - Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    3.443 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    3.5 - 3.75 MHz
  • Amateur (80 meter band) [Part 97]
    • 3.75 - 4 MHz
  • Amateur (75 meter band) [Part 97]
    • 4.0 - 4.152 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    4207.5 kHz
  • Digital Selective Calling (DSC) channel [part of Global Maritime Distress and Safety System (GMDSS)]
    • Gap in list
    4.281 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    4.351 - 4.438 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    5.000 MHz
  • Time and frequency broadcasts, WWV and WWVH
    • Gap in list
    5.332 MHz
  • Amateur (60 meter band) [Part 97]
    • Gap in list
    5.348 MHz
  • Amateur (60 meter band) [Part 97]
    • Gap in list
    5.368 MHz
  • Amateur (60 meter band) [Part 97]
    • Gap in list
    5.373 MHz
  • Amateur (60 meter band) [Part 97]
    • Gap in list
    5.405 MHz
  • Amateur (60 meter band) [Part 97]
    • Gap in list
    5.451 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    5.469 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    5.571 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    6.200 - 6.233 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    6312.0 kHz
  • Digital Selective Calling (DSC) channel [part of Global Maritime Distress and Safety System (GMDSS)]
    • Gap in list
    6.501 - 6.525 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    6.550 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    6.765 - 6.795 MHz
  • Industrial, Scientific and Medical [Part 18]
    • Gap in list
    7 - 7.3 MHz
  • Amateur (40 meter band) [Part 97]
    • Gap in list
    8.101 - 8.300 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    8414.5 kHz
  • Digital Selective Calling (DSC) channel [part of Global Maritime Distress and Safety System (GMDSS)]
    • Gap in list
    8.707 - 8.815 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    8.822 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    10.000 MHz
  • Time and frequency broadcasts, WWV and WWVH
    • Gap in list
    10.045 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    10.1 - 10.15 MHz
  • Amateur (30 meter band) [Part 97]
    • Gap in list
    11.288 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    11.306 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    12.230 - 12.368 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    12.577 MHz
  • Digital Selective Calling (DSC) channel [part of Global Maritime Distress and Safety System (GMDSS)]
    • Gap in list
    13.077 - 13.200 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    13.312 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    13.36 - 13.41 MHz
  • Radio astronomy
    • Gap in list
    13.553 - 13.567 MHz
  • Intentional radiators, 10,000 microvolts/meter at 30 meters max. [15.225]
  • Industrial, Scientific and Medical [Part 18]
    • Gap in list
    14 - 14.35 MHz
  • Amateur (20 meter band) [Part 97]
    • Gap in list
    15.000 MHz
  • Time and frequency broadcasts, WWV and WWVH
    • Gap in list
    16.360 - 16.549 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    16.8045 MHz
  • Digital Selective Calling (DSC) channel [part of Global Maritime Distress and Safety System (GMDSS)]
    • Gap in list
    17.242 - 17.410 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    17.964 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    18.068 - 18.17 MHz
  • Amateur (17 meter band) [Part 97]
    • Gap in list
    18.780 - 18.846 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    19.755 - 19.800 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    20.000 MHz
  • Time and frequency broadcasts, WWV
    • Gap in list
    21 - 21.45 MHz
  • Amateur (15 meter band) [Part 97]
    • Gap in list
    21.931 MHz
  • Flight test stations - land and aircraft [Part 87 Subpart J]
    • Gap in list
    22.000 - 22.180 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    22.696 - 22.855 MHz
  • Maritime SSB Radiotelephone [80.373]
    • Gap in list
    24.89 - 24.99 MHz
  • Amateur (12 meter band) [Part 97]
    • 24.990 - 25.005 MHz
  • 25000 kHz: standard frequency and time signals [2.106]
    • 25.02 MHz
  • Industrial/Business [90.35] only stations utilized for geophysical purposes
    • 25.04 MHz
  • Industrial/Business [90.35] oil spill containment and cleanup operations
    • 25.06 MHz
  • Industrial/Business [90.35] only stations utilized for geophysical purposes
    • 25.070 - 25.121 MHz
  • Maritime SSB Radiotelephone [80.373]
  • Industrial/Business [90.35]
    • 25.14 MHz
  • Industrial/Business [90.35]
    • only stations utilized for geophysical purposes
    25.16 MHz
  • Industrial/Business [90.35]
    • 25.18 MHz
  • Industrial/Business [90.35] only stations utilized for geophysical purposes
    • 25.20 MHz
  • Industrial/Business [90.35]
    • 25.22 MHz
  • Industrial/Business [90.35] geophysical stations on a secondary basis
    • 25.24 MHz
  • Industrial/Business [90.35]
    • 25.26 MHz
  • Industrial/Business [90.35] geophysical stations on a secondary basis
    • 25.28 MHz
  • Industrial/Business [90.35]
    • 25.30 MHz
  • Industrial/Business [90.35] geophysical stations on a secondary basis
    • Gap in list
    25.55 - 25.67 MHz
  • Radio astronomy
    • Gap in list
    25.85 - 26.48 MHz
  • Broadcast Auxiliary [Part 74 Subpart D]
  • 26.145 - 26.175 MHz only - Maritime SSB Radiotelephone [80.373] shore-to-ship
    • Gap in list
    26.617 MHz
  • Civil Air Patrol (CAP) (according to http://rob.acol.com/~cb/freeband.html)
    • Gap in list
    26.96 - 27.41 MHz
  • Citizens band (CB) [Part 95 - Subpart D]
  • 26.96 - 27.28 MHz
    • 27.430 MHz
  • Industrial/Business [90.35]
    • 27.450 MHz
  • Industrial/Business [90.35]
    • 27.470 MHz
  • Industrial/Business [90.35]
    • 27.490 MHz
  • Industrial/Business [90.35]
    • 27.510 MHz
  • Industrial/Business [90.35]
    • 27.530 MHz
  • Industrial/Business [90.35]
    • Gap in list
    27.870 MHz
  • US Navy-MARS (according to http://rob.acol.com/~cb/freeband.html)
    • Gap in list
    27.920 MHz
  • US Navy-MARS (according to http://rob.acol.com/~cb/freeband.html)
    • Gap in list
    27.97 MHz
  • US Navy-MARS (according to http://rob.acol.com/~cb/freeband.html)
    • Gap in list
    28 - 29.7 MHz
  • Amateur (10 meter band) [Part 97]
    • Gap in list
    Go higher in frequency | Table of Contents | Links to other pages
    This page written by John Neuhaus, WA2JXE <john@jneuhaus.com>. Please send me your comments and suggestions.
    Last update: 20 Jul 2015

    Disclaimer There is no warranty as to the accuracy or completeness of the information on these pages. All risk relating to its use is assumed by the user.

    This page is obsolete and no longer maintained