Return to the table of contents 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] Experimentation on "1750 meter band" 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 Working frequency for aircraft on over water flights [87.187(c)] Avalanche Transceivers 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] 25.08 MHz - oil spill containment and cleanup operations, secondary to maritime mobile 25.10 MHz - only stations utilized for geophysical purposes, secondary to maritime mobile 25.12 MHz - Industrial/Business 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] Channel frequency chart 26.96 - 27.28 MHz Intentional radiators, 10,000 microvolts/meter at 30 meters max. [15.227] Student experimental use (27.23 - 27.28 MHz) [5.89] Industrial, Scientific and Medical (26.957 - 27.283 MHz) [Part 18 - Subpart C] 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 . 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. 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