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Radio spectrum allocations

Look up a frequency or a range.

Examples: 88.5 MHz, 1350–1430 MHz, 2.4 GHz

247.999999999 GHz (247,999,999,999 Hz)

U.S. Federal Government Allocations

241 – 248 GHz

RADIO ASTRONOMY

RADIOLOCATION

5.138 US342

ITU Region 1 Allocations

241 – 248 GHz

RADIO ASTRONOMY

RADIOLOCATION

Amateur

Amateur-satellite

5.138 5.149

ITU Region 2 Allocations

241 – 248 GHz

RADIO ASTRONOMY

RADIOLOCATION

Amateur

Amateur-satellite

5.138 5.149

ITU Region 3 Allocations

241 – 248 GHz

RADIO ASTRONOMY

RADIOLOCATION

Amateur

Amateur-satellite

5.138 5.149

Footnotes

  • 5.138   The following bands:

      6 765-6 795 kHz (centre frequency 6 780 kHz),
      433.05-434.79 MHz (centre frequency 433.92 MHz) in Region 1 except in the countries mentioned in No. 5.280,
      61-61.5 GHz (centre frequency 61.25 GHz),
      122-123 GHz (centre frequency 122.5 GHz), and
      244-246 GHz (centre frequency 245 GHz)

    are designated for industrial, scientific and medical (ISM) applications. The use of these frequency bands for ISM applications shall be subject to special authorization by the administration concerned, in agreement with other administrations whose radiocommunication services might be affected. In applying this provision, administrations shall have due regard to the latest relevant ITU R Recommendations.

  • 5.149   In making assignments to stations of other services to which the bands:
    13 360-13 410 kHz,
    25 550-25 670 kHz,
    37.5-38.25 MHz,
    73-74.6 MHz in Regions 1 and 3,
    150.05-153 MHz in Region 1,
    322-328.6 MHz,
    406.1-410 MHz,
    608-614 MHz in Regions 1 and 3,
    1 330-1 400 MHz,
    1 610.6-1 613.8 MHz,
    1 660-1 670 MHz,
    1 718.8-1 722.2 MHz,
    2 655-2 690 MHz,
    3 260-3 267 MHz,
    3 332-3 339 MHz,
    3 345.8-3 352.5 MHz,
    4 825-4 835 MHz, 4 950-4 990 MHz,
    4 990-5 000 MHz,
    6 650-6 675.2 MHz,
    10.6-10.68 GHz,
    14.47-14.5 GHz,
    22.01-22.21 GHz,
    22.21-22.5 GHz,
    22.81-22.86 GHz,
    23.07-23.12 GHz,
    31.2-31.3 GHz,
    31.5-31.8 GHz in Regions 1 and 3,
    36.43-36.5 GHz,
    42.5-43.5 GHz,
    48.94-49.04 GHz,
    76-86 GHz,
    92-94 GHz,
    94.1-100 GHz, 102-109.5 GHz,
    111.8-114.25 GHz,
    128.33-128.59 GHz,
    129.23-129.49 GHz,
    130-134 GHz,
    136-148.5 GHz,
    151.5-158.5 GHz,
    168.59-168.93 GHz,
    171.11-171.45 GHz,
    172.31-172.65 GHz,
    173.52-173.85 GHz,
    195.75-196.15 GHz,
    209-226 GHz,
    241-250 GHz,
    252-275 GHz
    are allocated, administrations are urged to take all practicable steps to protect the radio astronomy service from harmful interference. Emissions from spaceborne or airborne stations can be particularly serious sources of interference to the radio astronomy service (see Nos. 4.5 and 4.6 and Article 29). (WRC 07)

  • US342   In making assignments to stations of other services to which the bands:

    13 360-13 410 kHz42.77-42.87 GHz*
    25 550-25 670 kHz43.07-43.17 GHz*
    37.5-38.25 MHz43.37-43.47 GHz*
    322-328.6 MHz*48.94-49.04 GHz*
    1330-1400 MHz*76-86 GHz
    1610.6-1613.8 MHz*92-94 GHz
    1660-1660.5 MHz*94.1-100 GHz
    1668.4-1670 MHz*102-109.5 GHz
    3260-3267 MHz*111.8-114.25 GHz
    3332-3339 MHz*128.33-128.59 GHz*
    3345.8-3352.5 MHz*129.23-129.49 GHz*
    4825-4835 MHz*130-134 GHz
    4950-4990 MHz136-148.5 GHz
    6650-6675.2 MHz*151.5-158.5 GHz
    14.47-14.5 GHz*168.59-168.93 GHz*
    22.01-22.21 GHz*171.11-171.45 GHz*
    22.21-22.5 GHz172.31-172.65 GHz*
    22.81-22.86 GHz*173.52-173.85 GHz*
    23.07-23.12 GHz*195.75-196.15 GHz*
    31.2-31.3 GHz209-226 GHz
    36.43-36.5 GHz*241-250 GHz
    42.5-43.5 GHz252-275 GHz

    are allocated (*indicates radio astronomy use for spectral line observations), all practicable steps shall be taken to protect the radio astronomy service from harmful interference. Emissions from spaceborne or airborne stations can be particularly serious sources of interference to the radio astronomy service (see ITU Radio Regulations at Nos. 4.5 and 4.6 and Article 29).

Wiki entries

WRC-23 Agenda Item 1.14 Possible Adjustments to EESS (passive) Allocations

Current Use 231.5–252 GHz Review of EESS (passive) Allocations
"to review and consider possible adjustments of the existing or possible new primary frequency allocations to EESS (passive) in the frequency range 231.5-252 GHz, to ensure alignment with more up-to-date remote-sensing observation requirements, in accordance with Resolution 662 (WRC-19);"

WRC-27 study for radiolocation use

Proposed Use 231.5–275 GHz WRC-27 study for primary radiolocation allocation
WRC-27 agenda item 1.8:

to consider possible additional spectrum allocations to the radiolocation service on a primary basis in the frequency range 231.5-275 GHz and possible new identifications for radiolocation service applications in the frequency bands within the frequency range 275-700 GHz for millimetric and sub-millimetric wave imaging systems, in accordance with Resolution 663 (Rev.WRC-23)