HF Radio Frequency List

High Frequency (HF) bands, ranging from 3 MHz to 30 MHz, are used extensively in amateur radio, maritime communication, aviation, and military operations. These bands allow for long-distance communication, especially under favorable conditions. Below is a list of commonly used HF frequencies, including amateur radio allocations and other notable frequencies.

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HF Amateur Radio Bands (ITU Region 2 – Americas)

80 meters (3.5 – 4.0 MHz)

  • 3.500 – 3.525 MHz: CW (Morse code) only.
  • 3.525 – 3.600 MHz: CW and data modes (RTTY, PSK31, etc.).
  • 3.600 – 4.000 MHz: CW, SSB (Single Sideband), and other voice modes.

60 meters (5.3305 – 5.4035 MHz)

  • 5.332 MHz
  • 5.348 MHz
  • 5.368 MHz
  • 5.373 MHz
  • 5.405 MHz
  • These channels are allocated for specific types of communications, often used for emergency and inter-agency communication.

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40 meters (7.0 – 7.3 MHz)

  • 7.000 – 7.025 MHz: CW only.
  • 7.025 – 7.125 MHz: CW and data modes.
  • 7.125 – 7.300 MHz: CW, SSB, and other voice modes.

30 meters (10.1 – 10.15 MHz)

  • 10.100 – 10.150 MHz: CW and data modes only.

20 meters (14.0 – 14.35 MHz)

  • 14.000 – 14.070 MHz: CW only.
  • 14.070 – 14.150 MHz: CW and data modes.
  • 14.150 – 14.350 MHz: CW, SSB, and other voice modes.

17 meters (18.068 – 18.168 MHz)

  • 18.068 – 18.110 MHz: CW and data modes.
  • 18.110 – 18.168 MHz: CW, SSB, and other voice modes.

15 meters (21.0 – 21.45 MHz)

  • 21.000 – 21.070 MHz: CW only.
  • 21.070 – 21.200 MHz: CW and data modes.
  • 21.200 – 21.450 MHz: CW, SSB, and other voice modes.

12 meters (24.890 – 24.990 MHz)

  • 24.890 – 24.930 MHz: CW and data modes.
  • 24.930 – 24.990 MHz: CW, SSB, and other voice modes.

10 meters (28.0 – 29.7 MHz)

  • 28.000 – 28.070 MHz: CW only.
  • 28.070 – 28.190 MHz: CW and data modes.
  • 28.190 – 29.700 MHz: CW, SSB, FM, and other voice modes.

Notable HF Frequencies for Other Uses

Maritime Mobile Service

  • 2.182 MHz: International distress, urgency, and safety frequency.
  • 8.291 MHz: International ship-to-ship and ship-to-shore communications.
  • 12.290 MHz: International maritime communications.

Aviation

  • 3.023 MHz: International aircraft communication.
  • 5.680 MHz: Long-range aviation communications.
  • 8.867 MHz: Aircraft to ground station communication.

Shortwave Listening (SWL) Bands

  • 3.900 – 4.000 MHz: International broadcast.
  • 5.900 – 6.200 MHz: International broadcast.
  • 9.400 – 9.900 MHz: International broadcast.

Military and Government

  • 4.724 MHz: US Coast Guard and military communication.
  • 6.507 MHz: US military communications.
  • 8.992 MHz: US Air Force Global HF System.

Citizen Band (CB) Radio

  • 26.965 – 27.405 MHz: CB radio channels (40 channels for general use).

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International Distress and Emergency Frequencies

  • 2.182 MHz: International distress frequency for maritime communications.
  • 5.650 MHz: Emergency and inter-agency coordination.
  • 8.364 MHz: Primary HF frequency for international distress and safety communications.

Utility and Weather Frequencies

  • 2.500 MHz: WWV time signal.
  • 5.000 MHz: WWV time signal.
  • 10.000 MHz: WWV time signal.
  • 15.000 MHz: WWV time signal.

These frequencies cover a broad spectrum of uses and can provide valuable communication capabilities for amateur radio operators, emergency responders, and general users.

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