47 Telecommunication 5 2025-10-01 false 2025-10-01 Editorial Note: Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES AVIATION SERVICES Frequencies
§ 87.173 Frequencies.

(a) The table in paragraph (b) of this section lists assignable carrier frequencies or frequency bands.

(1) The single letter symbol appearing in the “Subpart” column indicates the subpart of this part which contains additional applicable regulations.

(2) The two or three letter symbol appearing in the “Class of Station” column indicates the class of station to which the frequency is assignable.

(b) Frequency table:

Frequency or frequency band Subpart Class of station Remarks 90-110 kHz Q RL LORAN “C”. 190-285 kHz Q RLB Radiobeacons. 200-285 kHz O FAC Air traffic control. 325-405 kHz O FAC Air traffic control. 325-435 kHz Q RLB Radiobeacons. 410.0 kHz F MA International direction-finding for use outside of United States. 457.0 kHz F MA Working frequency for aircraft on over-water flights. 500.0 kHz F MA International calling and distress frequency for ships and aircraft on over-water flights. 510-535 kHz Q RLB Radiobeacons. 2182.0 kHz F MA International distress and calling. 2648.0 kHz I AX Alaska station. 2850.0-3025.0 kHz I MA, FAE International HF. 2851.0 kHz I, J MA, FAE, FAT International HF; Flight Test. 2866.0 kHz I MA, FAE Domestic HF; (Alaska). 2875.0 kHz I MA, FAE Domestic HF. 2878.0 kHz I MA1, FAE Domestic HF; International HF. 2911.0 kHz I MA, FAE Domestic HF. 2956.0 kHz I MA, FAE Domestic HF. 3004.0 kHz I, J MA, FAE, FAT International HF; Flight Test. 3019.0 kHz I MA1, FAE Domestic HF; International HF. 3023.0 kHz F, M, O MA1, FAR, FAC Search and rescue communications. 3281.0 kHz K MA, FAS Lighter-than-air craft and aeronautical stations serving lighter-than-air craft. 3400.0-3500.0 kHz I MA, FAE International HF. 3434.0 kHz I MA1, FAE Domestic HF. 3443.0 kHz J MA, FAT Flight Test. 3449.0 kHz I MA, FAE Domestic HF. 3470.0 kHz I MA, FAE Domestic HF; International HF. 4125.0 kHz F MA Distress and safety with ships and coast stations. 4550.0 kHz I AX Gulf of Mexico. 4645.0 kHz I AX Alaska. 4650.0-4700.0 kHz I MA, FAE International HF. 4672.0 kHz I MA1, FAE Domestic HF. 4947.5 kHz I AX Alaska. 5036.0 kHz I AX Gulf of Mexico. 5122.5 kHz I AX Alaska. 5167.5 kHz I FA Alaska emergency. 5310.0 kHz I AX Alaska. 5450.0-5680.0 kHz I MA, FAE International HF. 5451.0 kHz J MA, FAT Flight Test. 5463.0 kHz I MA1, FAE Domestic HF. 5469.0 kHz J MA, FAT Flight Test. 5472.0 kHz I MA, FAE Domestic HF. 5484.0 kHz I MA, FAE Domestic HF. 5490.0 kHz I MA, FAE Domestic HF. 5496.0 kHz I MA, FAE Domestic HF. 5508.0 kHz I MA1, FAE Domestic HF. 5571.0 kHz J MA, FAT Flight Test. 5631.0 kHz I MA, FAE Domestic HF. 5680.0 kHz F, M, O MA1, FAC, FAR Search and rescue communications. 5887.5 kHz I AX Alaska. 6525.0-6685.0 kHz I MA, FAE International HF. 6550.0 kHz J MA, FAT Flight Test. 6580.0 kHz I MA, FAE Domestic HF. 6604.0 kHz I MA, FAE Domestic HF. 8015.0 kHz I AX Alaska. 8364.0 kHz F MA Search and rescue communications. 8815.0-8965.0 kHz I MA, FAE International HF. 8822.0 kHz J MA, FAT Flight Test. 8855.0 kHz I MA, FAE Domestic HF; international HF. 8876.0 kHz I MA, FAE Domestic HF. 10005.0-10100.0 kHz I MA, FAE International HF. 10045.0 kHz J MA, FAT Flight Test. 10066.0 kHz I MA, FAE Domestic HF; international HF. 11275.0-11400.0 kHz I MA, FAE International HF. 11288.0 kHz J MA, FAT Flight Test. 11306.0 kHz J MA, FAT Flight Test. 11357.0 kHz I MA, FAE Domestic HF. 11363.0 kHz I MA, FAE Domestic HF. 13260.0-13360.0 kHz I MA, FAE International HF. 13312.0 kHz I, J MA, FAE, FAT International HF; Flight Test. 17900.0-17970.0 kHz I MA, FAE International HF. 17964.0 kHz J MA, FAT Flight Test. 21924.0-22000.0 kHz I MA, FAE International HF. 21931.0 kHz J MA, FAT Flight Test. 72.02-72.98 MHz P FA, AXO Operational fixed. 75.000 MHz Q RLA Marker beacon. 75.42-75.98 MHz P FA, AXO Operational fixed. 108.000 MHz Q RLT   108.000-117.950 MHz Q RLO VHF omni-range. 108.000-117.975 MHz Q DGP Differential GPS. 108.050 MHz Q RLT   108.100-111.950 MHz Q RLL ILS Localizer. 108.100 MHz Q RLT   108.150 MHz Q RLT   118.000-121.400 MHz O, S MA, FAC, FAW, GCO
  • RCO, RPC
    •  25 kHz channel spacing.     121.500 MHz G, H, I, J, K, M, O MA, FAU, FAE, FAT, FAS, FAC, FAM Emergency and distress. 121.600-121.925 MHz O, L, Q MA, FAC, MOU, RLT, GCO, RCO, RPC 25 kHz channel spacing. 121.950 MHz K FAS   121.975 MHz F, S MA2, FAW, FAC, MOU Air traffic control operations. 122.000 MHz F MA, FAC, MOU Air carrier and private aircraft enroute flight advisory service provided by FAA. 122.025 MHz F, S MA2, FAW, FAC, MOU Air traffic control operations. 122.050 MHz F MA, FAC, MOU Air traffic control operations. 122.075 MHz F, S MA2, FAW, FAC, MOU Air traffic control operations. 122.100 MHz F, O MA, FAC, MOU Air traffic control operations. 122.125-122.675 MHz F MA2, FAC, MOU Air traffic control operations; 25 kHz spacing. 122.700 MHz G, L, Q MA, FAU, MOU, AVW Unicom at airports with no control tower; Aeronautical utility stations. 122.725 MHz G, L, Q MA, FAU, MOU, AVW Unicom at airports with no control tower; Aeronautical utility stations. 122.750 MHz F, Q MA2, AVW Private fixed wing aircraft air-to-air communications. 122.775 MHz K MA, FAS   122.800 MHz G, L, Q MA, FAU, MOU, AVW Unicom at airports with no control tower; Aeronautical utility stations. 122.825 MHz I MA, FAE Domestic VHF. 122.850 MHz H, K, Q MA, FAM, FAS, AVW. 122.875 MHz I MA, FAE Domestic VHF. 122.900 MHz F, H, L, M, Q MA, FAR, FAM, MOU, AVW 122.925 MHz H MA2, FAM 122.950 MHz G, L, Q MA, FAU, MOU, AVW Unicom at airports with control tower; Aeronautical utility stations. 122.975 MHz G, L, Q MA, FAU, MOU, AVW Unicom at airports with no control tower; Aeronautical utility stations. 123.000 MHz G, L, Q MA, FAU, MOU, AVW Unicom at airports with no control tower; Aeronautical utility stations. 123.025 MHz F, Q MA2, AVW Helicopter air-to-air communications; Air traffic control operations. 123.050 MHz G, L, Q MA, FAU, MOU, AVW Unicom at airports with no control tower; Aeronautical utility stations. 123.075 MHz G, L, Q MA, FAU, MOU, AVW Unicom at airports with no control tower; Aeronautical utility stations. 123.100 MHz M, O MA, FAC, FAR   123.125 MHz J MA, FAT Itinerant. 123.150 MHz J MA, FAT Itinerant. 123.175 MHz J MA, FAT Itinerant. 123.200 MHz J MA, FAT   123.225 MHz J MA, FAT   123.250 MHz J MA, FAT   123.275 MHz J MA, FAT   123.300 MHz K, Q MA, FAS, AVW. 123.325 MHz J MA, FAT   123.350 MHz J MA, FAT   123.375 MHz J MA, FAT   123.400 MHz J MA, FAT Itinerant. 123.425 MHz J MA, FAT   123.450 MHz J MA, FAT   123.475 MHz J MA, FAT   123.500 MHz K, Q MA, FAS, AVW. 123.525 MHz J MA, FAT   123.550 MHz J MA, FAT   123.575 MHz J MA, FAT   123.6-128.8 MHz O, S MA, FAC, FAW, GCO, RCO, RPC 25 kHz channel spacing. 128.825-132.000 MHz I MA, FAE Domestic VHF. 131.450 MHz I DLT. 131.550 MHz I DLT. 131.725 MHz I DLT. 131.825 MHz I DLT. 132.025-135.975 MHz O, S MA, FAC, FAW, GCO RCO RPC 25 kHz channel spacing. 136.000-136.400 MHz O, S MA, FAC, FAW, GCO, RCO, RPC Air traffic control operations; 25 kHz channel spacing. 136.425 MHz O, S MA, FAC, FAW, GCO, RCO, RPC Air traffic control operations. 136.450 MHz O, S MA, FAC, FAW, GCO, RCO, RPC Air traffic control operations. 136.475 MHz O, S MA, FAC, FAW, GCO, RCO, RPC Air traffic control operations. 136.500-136.875 MHz I MA, FAE Domestic VHF; 25 kHz channel spacing. 136.850 MHz I DLT. 136.900 MHz I MA, FAE, DLT International and Domestic VHF. 136.925 MHz I MA, FAE, DLT International and Domestic VHF. 136.950 MHz I MA, FAE, DLT International and Domestic VHF. 136.975 MHz I MA, FAE, DLT International and Domestic VHF. 156.300 MHz F MA For communications with ship stations under specific conditions. 156.375 MHz F MA For communications with ship stations under specific conditions; Not authorized in New Orleans Vessel traffic service area. 156.400 MHz F MA For communications with ship stations under specific conditions. 156.425 MHz F MA For communications with ship stations under specific conditions. 156.450 MHz F MA For communications with ship stations under specific conditions. 156.625 MHz F MA For communications with ship stations under specific conditions. 156.800 MHz F MA Distress, safety and calling frequency; For communications with ship stations under specific conditions. 156.900 MHz F MA For communications with ship stations under specific conditions. 157.425 MHz F MA For communications with commercial fishing vessels under specific conditions except in Great Lakes and St. Lawrence Seaway Areas. 243.000 MHz F MA Emergency and distress frequency for use of survival craft and emergency locator transmitters. 328.600-335.400 MHz Q RLG ILS glide path. 334.550 MHz Q RLT 334.700 MHz Q RLT 406.0-406.1 MHz F, G, H, I, J, K, M, O MA, FAU, FAE, FAT, FAS, FAC, FAM Emergency and distress. 960-1215 MHz F, Q MA, RL, RNV Electronic aids to air navigation. 978.000 MHz F, L, Q MA, MOU, UAT Universal Access Transceivers.   UAT   Q RLT 979.000 MHz Q RLT 1030.000 MHz Q RLT. 1090.000 MHz L MOU, RLT Vehicle Squitter. 1104.000 MHz Q RLT 1300-1350 MHz F, Q MA, RLS Surveillance radars and transponders. 1435-1525 MHz F, J MA, FAT Aeronautical telemetry and telecommand operations. 1559-1610 MHz Q DGP Differential GPS. 1559-1626.5 MHz F, Q MA, RL Aeronautical radionavigation. 1646.5-1660.5 MHz F TJ Aeronautical Mobile-Satellite (R). 2345-2395 MHz J MA, FAT Aeronautical telemetry and telecommand operations. 2700-2900 MHz Q RLS, RLD Airport surveillance and weather radar. 4200-4400 MHz F MA Radio altimeters. 5030-5150 MHz Q MA, RLW Microwave landing systems. 5031.000 MHz Q RLT 5091-5150 MHz J MA, FAT Aeronautical telemetry. 5350-5470 MHz F MA Airborne radars and associated airborne beacons. 8750-8850 MHz F MA Airborne doppler radar. 9000-9200 MHz Q RLS, RLD Land-based radar. 9300-9500 MHz F, Q MA Airborne radars and associated airborne beacons. 13250-13400 MHz F MA Airborne doppler radar. 15400-15700 MHz Q RL Aeronautical radionavigation. 24450-24650 MHz F, Q MA, RL Aeronautical radionavigation. 32300-33400 MHz F, Q MA, RL Aeronautical radionavigation.     [53 FR 28940, Aug. 1, 1988] Editorial Note:

    For Federal Register citations affecting § 87.183, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.