U.S. Non-Federal-Government Allocations
FCC rule parts
SpectrumWiki
Radio spectrum allocations
Look up a frequency or a range.
Examples: 88.5 MHz, 1350–1430 MHz, 2.4 GHz
40.979999 MHz (40,979,999 Hz)
U.S. Federal Government Allocations
FIXED
MOBILE
ITU Region 1 Allocations
FIXED
MOBILE
ITU Region 2 Allocations
FIXED
MOBILE
ITU Region 3 Allocations
FIXED
MOBILE
Footnotes
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5.150 The following bands:
- 13 553-13 567 kHz (centre frequency 13 560 kHz),
- 26 957-27 283 kHz (centre frequency 27 120 kHz),
- 40.66-40.70 MHz (centre frequency 40.68 MHz),
- 902-928 MHz in Region 2 (centre frequency 915 MHz),
- 2 400-2 500 MHz (centre frequency 2 450 MHz),
- 5 725-5 875 MHz (centre frequency 5 800 MHz), and
- 24-24.25 GHz (centre frequency 24.125 GHz)
are also designated for industrial, scientific and medical (ISM) applications. Radiocommunication services operating within these bands must accept harmful interference which may be caused by these applications. ISM equipment operating in these bands is subject to the provisions of No. 15.13.
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US210 In the bands 40.66-40.7 MHz and 216-220 MHz, frequencies may be authorized to Federal and non-Federal stations on a secondary basis for the tracking of, and telemetering of scientific data from, ocean buoys and wildlife. Operation in these bands is subject to the technical standards specified in: (a) Section 8.2.42 of the NTIA Manual for Federal use, or (b) 47 CFR 90.248 for non-Federal use. After January 1, 2002, no new assignments shall be authorized in the band 216-217 MHz.
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US220 The frequencies 36.25 and 41.71 MHz may be authorized to Federal stations and non-Federal stations in the petroleum radio service, for oil spill containment and cleanup operations. The use of these frequencies for oil spill containment or cleanup operations is limited to the inland and coastal waterway regions.
Wiki entries
Access Broadband over Power Line (Access BPL)
Current Use
22–74.8 MHz Access BPL
According to the FCC's definition, Access BPL is "a carrier current system installed and operated on an electric utility service as an unintentional radiator that sends radio frequency energy on frequencies between 1.705 MHz and 80 MHz over medium voltage lines or over low voltage lines to provide broadband communications and is located on the supply side of the utility service’s points of interconnection with customer premises. Access BPL does not include power line carrier systems as defined in § 15.3(t) or In-House BPL as defined in § 15.3(gg)."
Low voltage lines are defined as lines carrying, for example, 240/120 volts from a distribution transformer to a customer's premises. Medium voltage lines carry between 1,000 and 40,000 volts from a power substation to neighborhoods, and may be overhead or underground.
Access BPL is an unlicensed service operated under Subpart G of Part 15 of the FCC's rules. Radiated emission limits from medium voltage lines in the 1.705-30 MHz range must not exceed the limits in 47 CFR 15.209, and those from 30-80 MHz must not exceed the limits in 15.109(b). Systems that operate on low voltage lines must comply with 15.109(a) limits across the entire 1.705-80 MHz range.
When Access BPL systems must use notch filters to protect licensed services, the notch must be at least 25 dB below applicable Part 15 limits in the 1.705-30 MHz band, and at least 10 dB below the limits in the 30-80 MHz band.
There are 12 sub-bands in which Access BPL systems are not allowed to operate anywhere to protect aeronautical (land) stations and aircraft receivers. Those excluded bands are listed in 15.615(f), and are excluded in the list of Access BPL bands in this entry.
Access BPL systems are not allowed to operate within the sub-band 2173.5-2190.5 kHz within 1 km of coast station facilities listed in 47 CFR 15.615(f)(2)(i), to protect the internationally-recognized standard maritime calling frequency of 2182 kHz.
No Access BPL emissions are allowed in the 73.0-74.6 MHz radio astronomy band on overhead medium voltage lines within 65 km of the Very Large Array radio telescope in New Mexico (34 04 43.5N, 107 37 03.82W), or within 47 km of the VLA on underground power lines or overhead low voltage lines.
Access BPL operators must consult at least 30 days in advance when deploying systems near various FCC field offices, aeronautical and maritime stations, radar systems, radio astronomy stations, and research areas. Details are in 47 CFR 15.615(f)(3).
Low voltage lines are defined as lines carrying, for example, 240/120 volts from a distribution transformer to a customer's premises. Medium voltage lines carry between 1,000 and 40,000 volts from a power substation to neighborhoods, and may be overhead or underground.
Access BPL is an unlicensed service operated under Subpart G of Part 15 of the FCC's rules. Radiated emission limits from medium voltage lines in the 1.705-30 MHz range must not exceed the limits in 47 CFR 15.209, and those from 30-80 MHz must not exceed the limits in 15.109(b). Systems that operate on low voltage lines must comply with 15.109(a) limits across the entire 1.705-80 MHz range.
When Access BPL systems must use notch filters to protect licensed services, the notch must be at least 25 dB below applicable Part 15 limits in the 1.705-30 MHz band, and at least 10 dB below the limits in the 30-80 MHz band.
There are 12 sub-bands in which Access BPL systems are not allowed to operate anywhere to protect aeronautical (land) stations and aircraft receivers. Those excluded bands are listed in 15.615(f), and are excluded in the list of Access BPL bands in this entry.
Access BPL systems are not allowed to operate within the sub-band 2173.5-2190.5 kHz within 1 km of coast station facilities listed in 47 CFR 15.615(f)(2)(i), to protect the internationally-recognized standard maritime calling frequency of 2182 kHz.
No Access BPL emissions are allowed in the 73.0-74.6 MHz radio astronomy band on overhead medium voltage lines within 65 km of the Very Large Array radio telescope in New Mexico (34 04 43.5N, 107 37 03.82W), or within 47 km of the VLA on underground power lines or overhead low voltage lines.
Access BPL operators must consult at least 30 days in advance when deploying systems near various FCC field offices, aeronautical and maritime stations, radar systems, radio astronomy stations, and research areas. Details are in 47 CFR 15.615(f)(3).
Experimental Ultra-Wideband (UWB) Systems
Current Use
30–50 MHz
Experimental ultra-wideband (UWB) systems have been developed in the 30—50 MHz spectrum. These high data rate transmissions use ground or surface wave propagation to communicate over distances of several kilometers, through foliage and buildings and over hills. Most UWB technology uses higher bands.
(Source: Wireless Spectrum Finder by Bennett Z. Kobb. Wireless Spectrum Finder is now (c)MMX Technology LLC).
(Source: Wireless Spectrum Finder by Bennett Z. Kobb. Wireless Spectrum Finder is now (c)MMX Technology LLC).
Single Channel Ground and Airborne Radio System (SINCGARS)
Current Use
30–87.975 MHz
A longstanding Army portable and mobile system, operating across 30 - 87.975 MHz, is the Single Channel Ground and Airborne Radio System (SINCGARS). These radios provide frequency-hopping, secure voice, and data communications.
(Source: Wireless Spectrum Finder, by Bennett Z. Kobb. Wireless Spectrum Finder is now (c)MMX Technology LLC).
(Source: Wireless Spectrum Finder, by Bennett Z. Kobb. Wireless Spectrum Finder is now (c)MMX Technology LLC).
Federal Government fixed/mobile
Current Use
40–42 MHz
The bands 32-33 MHz, 34-35 MHz, 36-37 MHz, 38-39 MHz, and 40-42 MHz are for federal agency and Army, Navy, Marine, and Air Force fixed and mobile use, supporting training, test range operations, research and development, and search and rescue.