U.S. Non-Federal-Government Allocations
AMATEUR
FCC rule parts
SpectrumWiki
Radio spectrum allocations
Look up a frequency or a range.
Examples: 88.5 MHz, 1350–1430 MHz, 2.4 GHz
1.85 MHz (1,850,000 Hz)
U.S. Federal Government Allocations
ITU Region 1 Allocations
FIXED
MOBILE except aeronautical mobile
ITU Region 2 Allocations
AMATEUR
FIXED
MOBILE except aeronautical mobile
RADIOLOCATION
RADIONAVIGATION
ITU Region 3 Allocations
AMATEUR
FIXED
MOBILE except aeronautical mobile
RADIONAVIGATION
Radiolocation
Footnotes
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5.92 Some countries of Region 1 use radiodetermination systems in the bands 1 606.5 1 625 kHz, 1 635 1 800 kHz, 1 850-2 160 kHz, 2 194-2 300 kHz, 2 502-2 850 kHz and 3 500-3 800 kHz, subject to agreement obtained under No. 9.21. The radiated mean power of these stations shall not exceed 50 W.
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5.96 In Germany, Armenia, Austria, Azerbaijan, Belarus, Croatia, Denmark, Estonia, the Russian Federation, Finland, Georgia, Hungary, Ireland, Iceland, Israel, Kazakhstan, Latvia, Liechtenstein, Lithuania, Malta, Moldova, Norway, Uzbekistan, Poland, Kyrgyzstan, Slovakia, the Czech Rep., the United Kingdom, Sweden, Switzerland, Tajikistan, Turkmenistan and Ukraine, administrations may allocate up to 200 kHz to their amateur service in the frequency bands 1 715-1 800 kHz and 1 850 2 000 kHz. However, when allocating the frequency bands within this range to their amateur service, administrations shall, after prior consultation with administrations of neighbouring countries, take such steps as may be necessary to prevent harmful interference from their amateur service to the fixed and mobile services of other countries. The mean power of any amateur station shall not exceed 10 W. (WRC 15)
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5.97 In Region 3, the Loran system operates either on 1 850 kHz or 1 950 kHz, the bands occupied being 1 825 1 875 kHz and 1 925-1 975 kHz respectively. Other services to which the band 1 800-2 000 kHz is allocated may use any frequency therein on condition that no harmful interference is caused to the Loran system operating on 1 850 kHz or 1 950 kHz.
- 5.102
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5.103 In Region 1, in making assignments to stations in the fixed and mobile services in the bands 1 850 2 045 kHz, 2 194-2 498 kHz, 2 502-2 625 kHz and 2 650-2 850 kHz, administrations should bear in mind the special requirements of the maritime mobile service.
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NG92 The band 1900-2000 kHz is also allocated on a primary basis to the maritime mobile service in Regions 2 and 3 and to the radiolocation service in Region 2, and on a secondary basis to the radiolocation service in Region 3. The use of these allocations is restricted to radio buoy operations on the open sea and the Great Lakes. Stations in the amateur, maritime mobile, and radiolocation services in Region 2 shall be protected from harmful interference only to the extent that the offending station does not operate in compliance with the technical rules applicable to the service in which it operates.
Wiki entries
Access Broadband over Power Line (Access BPL)
Current Use
1.705–2.85 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).
Amateur Radio 160 m Band (ITU Regions 2 & 3)
Current Use
1.8–2 MHz Amateur Radio 160 m Band (ITU Regions 2 & 3)
According to the ITU, the propagation characteristics in this band "allow short-range communications during daytime hours, and medium and long-range communications during night-time hours. This band is particularly useful during sunspot minima, when the maximum usable frequency (MUF) is below 3500 kHz."
The band is often referred to as "160 meters", referring to its approximate wavelength.
In the United States, the following 160 m band plan has been adopted by the ARRL, the National Association for Amateur Radio. Some or all of this band plan may apply in other countries as well. By FCC rules, the entire band is available for RTTY, data, phone, and image for General, Advanced, and Extra class operators, although adherence to the band plan is recommended.
ARRL BAND PLAN:
EXTRA, ADVANCED, AND GENERAL:
The band is often referred to as "160 meters", referring to its approximate wavelength.
In the United States, the following 160 m band plan has been adopted by the ARRL, the National Association for Amateur Radio. Some or all of this band plan may apply in other countries as well. By FCC rules, the entire band is available for RTTY, data, phone, and image for General, Advanced, and Extra class operators, although adherence to the band plan is recommended.
ARRL BAND PLAN:
| Frequency (kHz) | Use |
| 1800 - 2000 | CW |
| 1800 - 1810 | Digital Modes |
| 1810 | CW QRP |
| 1843-2000 | SSB, SSTV, and other wideband modes |
| 1910 | SSB QRP |
| 1995-2000 | Experimental |
| 1999-2000 | Beacons |
EXTRA, ADVANCED, AND GENERAL:
| Range (kHz) | Authorized Use(s) |
| 1800-2000 | RTTY, data, phone, and image |
LORAN
Current Use
1.85 MHz LORAN-A (historic)
LORAN (LOng RAnge Navigation) is a hyperbolic navigation system used for maritime and aeronautical navigation. The LORAN system was first developed during World War II, and continues in use in some parts of the world today. In the United States, LORAN was deemed to be unnecessary after the advent of GPS, and funding for U.S. LORAN stations was discontinued in 2010.
The earliest version of LORAN, LORAN-A, used frequencies in the 1.7-2 MHz range. LORAN-B was an improved variant of LORAN-A. LORAN-A operations in the United States were shut down in 1980. LORAN-C, components of which are still in operation, uses a frequency of 100 kHz, but the pulsed nature of the emissions spread the occupied band to roughly 90-110 kHz. LORAN-D was a shorter range/higher accuracy tactical system.
The earliest version of LORAN, LORAN-A, used frequencies in the 1.7-2 MHz range. LORAN-B was an improved variant of LORAN-A. LORAN-A operations in the United States were shut down in 1980. LORAN-C, components of which are still in operation, uses a frequency of 100 kHz, but the pulsed nature of the emissions spread the occupied band to roughly 90-110 kHz. LORAN-D was a shorter range/higher accuracy tactical system.