{"data":{"id":"us/47-cfr-90.273","jurisdiction":"us","citation":"47 CFR 90.273","heading":"Availability and use of frequencies in the 421-430 MHz band.","body":"The frequency bands 422.1875-425.4875 MHz and 427.1875-429.9875 MHz are available for use in the Detroit, Michigan and Cleveland, Ohio areas. The bands 423.8125-425.4875 MHz and 428.8125-429.9875 MHz are available for use in the Buffalo, New York area. Sections 90.273 through 90.281 address the specific rules applicable to these bands. Use of these bands is also subject to the general technical standards and application procedures contained in other subparts of part 90. The technical standards applicable in this band are the same as those contained in subpart I of part 90 for the 450-470 MHz band. Private land mobile use of these frequencies is subject to accepting any interference from Federal Government radiolocation operations.\n(a) The following tables list frequencies available for assignment in the Public Safety and Industrial/Business Pools as indicated. In the tables, the Public Safety Pool frequencies are denoted as “PS” and the Industrial/Business Pool frequencies are denoted as “IB.” The frequencies 422.19375 MHz through 424.99375 MHz are paired with frequencies 427.19375 MHz through 429.99375 MHz, respectively. Only the lower half of each frequency pair, available for base station operation, is listed in the tables. Corresponding mobile and control station frequencies are 5 MHz higher than the base station frequency. The frequencies 425.000 through 425.48125 are unpaired and are available for either single frequency dispatch or paging operations.\nTable 1—Channels Available in Detroit and Cleveland Areas Only\nFrequency (MHz) Pool in which assigned\nPaired channels:\n422.19375 * IB\n422.200 IB\n422.20625 * IB\n422.21250 IB\n422.21875 * IB\n422.225 IB\n422.23125 * IB\n422.23750 IB\n422.24375 * IB\n422.250 IB\n422.25625 * IB\n422.26250 IB\n422.26875 * IB\n422.275 IB\n422.28125 * IB\n422.28750 IB\n422.29375 * IB\n422.300 IB\n422.30625 * IB\n422.31250 IB\n422.31875 * IB\n422.325 IB\n422.33125 * IB\n422.33750 IB\n422.34375 * IB\n422.350 IB\n422.35625 * IB\n422.36250 IB\n422.36875 * IB\n422.375 IB\n422.38125 * IB\n422.38750 IB\n422.39375 * IB\n422.400 IB\n422.40625 * IB\n422.41250 IB\n422.41875 * IB\n422.425 IB\n422.43125 * IB\n422.43750 IB\n422.44375 * IB\n422.450 IB\n422.45625 * IB\n422.46250 IB\n422.46875 * IB\n422.475 IB\n422.48125 * IB\n422.48750 IB\n422.49375 * IB\n422.500 IB\n422.50625 * IB\n422.51250 IB\n422.51875 * IB\n422.525 IB\n422.53125 * IB\n422.53750 IB\n422.54375 * IB\n422.550 IB\n422.55625 * IB\n422.56250 IB\n422.56875 * IB\n422.575 IB\n422.58125 * IB\n422.58750 IB\n422.59375 * IB\n422.600 IB\n422.60625 * IB\n422.61250 IB\n422.61875 * IB\n422.625 IB\n422.63125 * IB\n422.63750 IB\n422.64375 * IB\n422.650 IB\n422.65625 * IB\n422.66250 IB\n422.66875 * IB\n422.675 IB\n422.68125 * IB\n422.68750 IB\n422.69375 * IB\n422.700 IB\n422.70625 * IB\n422.71250 IB\n422.71875 * IB\n422.725 IB\n422.73125 * IB\n422.73750 IB\n422.74375 * IB\n422.750 IB\n422.75625 * IB\n422.76250 IB\n422.76875 * IB\n422.775 IB\n422.78125 * IB\n422.78750 IB\n422.79375 * IB\n422.800 IB\n422.80625 * IB\n422.81250 IB\n422.81875 * IB\n422.825 IB\n422.83125 * IB\n422.83750 IB\n422.84375 * IB\n422.850 IB\n422.85625 * IB\n422.86250 IB\n422.86875 * IB\n422.875 IB\n422.88125 * IB\n422.88750 IB\n422.89375 * IB\n422.900 IB\n422.90625 * IB\n422.91250 IB\n422.91875 * IB\n422.925 IB\n422.93125 * IB\n422.93750 IB\n422.94375 * IB\n422.950 IB\n422.95625 * IB\n422.96250 IB\n422.96875 * IB\n422.975 IB\n422.98125 * IB\n422.98750 IB\n422.99375 * IB\n423.000 PS\n423.00625 * PS\n423.01250 PS\n423.01875 * PS\n423.025 PS\n423.03125 * PS\n423.03750 PS\n423.04375 * PS\n423.050 PS\n423.05625 * PS\n423.06250 PS\n423.06875 * PS\n423.075 PS\n423.08125 * PS\n423.08750 PS\n423.09375 * PS\n423.100 PS\n423.10625 * PS\n423.11250 PS\n423.11875 * PS\n423.125 PS\n423.13125 * PS\n423.13750 PS\n423.14375 * PS\n423.150 PS\n423.15625 * PS\n423.16250 PS\n423.16875 * PS\n423.175 PS\n423.18125 * PS\n423.18750 PS\n423.19375 * PS\n423.200 PS\n423.20625 * PS\n423.21250 PS\n423.21875 * PS\n423.225 PS\n423.23125 * PS\n423.23750 PS\n423.24375 * PS\n423.250 PS\n423.25625 * PS\n423.26250 PS\n423.26875 * PS\n423.275 PS\n423.28125 * PS\n423.28750 PS\n423.29375 * PS\n423.300 PS\n423.30625 * PS\n423.31250 PS\n423.31875 * PS\n423.325 PS\n423.33125 * PS\n423.33750 PS\n423.34375 * PS\n423.350 PS\n423.35625 * PS\n423.36250 PS\n423.36875 * PS\n423.375 PS\n423.38125 * PS\n423.38750 PS\n423.39375 * PS\n423.400 PS\n423.40625 * PS\n423.41250 PS\n423.41875 * PS\n423.425 PS\n423.43125 * PS\n423.43750 PS\n423.44375 * PS\n423.450 PS\n423.45625 * PS\n423.46250 PS\n423.46875 * PS\n423.475 PS\n423.48125 * PS\n423.48750 PS\n423.49375 * PS\n423.500 PS\n423.50625 * PS\n423.51250 PS\n423.51875 * PS\n423.525 PS\n423.53125 * PS\n423.53750 PS\n423.54375 * PS\n423.550 PS\n423.55625 * PS\n423.56250 PS\n423.56875 * PS\n423.575 PS\n423.58125 * PS\n423.58750 PS\n423.59375 * PS\n423.600 PS\n423.60625 * PS\n423.61250 PS\n423.61875 * PS\n423.625 PS\n423.63125 * PS\n423.63750 PS\n423.64375 * PS\n423.650 PS\n423.65625 * PS\n423.66250 PS\n423.66875 * PS\n423.675 PS\n423.68125 * PS\n423.68750 PS\n423.69375 * PS\n423.700 PS\n423.70625 * PS\n423.71250 PS\n423.71875 * PS\n423.725 PS\n423.73125 * PS\n423.73750 PS\n423.74375 * PS\n423.750 PS\n423.75625 * PS\n423.76250 PS\n423.76875 * PS\n423.775 PS\n423.78125 * PS\n423.78750 PS\n423.79375 * PS\n423.800 PS\n423.80625 * PS\n* This frequency will be assigned with an authorized bandwidth not to exceed 6 kHz.\nTable 2—Channels Available in Buffalo, Detroit and Cleveland Areas\nFrequency (MHz) Pool in which assigned\nPaired channels:\n423.81875 * PS\n423.825 PS\n423.83125 * PS\n423.83750 PS\n423.84375 * PS\n423.850 PS\n423.85625 * PS\n423.86250 PS\n423.86875 * PS\n423.875 PS\n423.88125 * PS\n423.88750 PS\n423.89375 * PS\n423.900 PS\n423.90625 * PS\n423.91250 PS\n423.91875 * PS\n423.925 PS\n423.93125 * PS\n423.93750 PS\n423.94375 * PS\n423.950 PS\n423.95625 * PS\n423.96250 PS\n423.96875 * PS\n423.975 PS\n423.98125 * PS\n423.98750 PS\n423.99375 * PS\n424.000 PS\n424.00625 * PS\n424.01250 PS\n424.01875 * PS\n424.025 PS\n424.03125 * PS\n424.03750 PS\n424.04375 * PS\n424.050 PS\n424.05625 * PS\n424.06250 PS\n424.06875 * PS\n424.075 PS\n424.08125 * PS\n424.08750 PS\n424.09375 * PS\n424.100 PS\n424.10625 * PS\n424.11250 PS\n424.11875 * PS\n424.125 PS\n424.13125 * PS\n424.13750 PS\n424.14375 * PS\n424.150 PS\n424.15625 * PS\n424.16250 PS\n424.16875 * PS\n424.175 PS\n424.18125 * PS\n424.18750 PS\n424.19375 * PS\n424.200 PS\n424.20625 * PS\n424.21250 PS\n424.21875 * PS\n424.225 PS\n424.23125 * PS\n424.23750 PS\n424.24375 * PS\n424.250 PS\n424.25625 * PS\n424.26250 PS\n424.26875 * PS\n424.275 PS\n424.28125 * PS\n424.28750 PS\n424.29375 * PS\n424.300 PS\n424.30625 * PS\n424.31250 PS\n424.31875 * PS\n424.325 PS\n424.33125 * PS\n424.33750 PS\n424.34375 * PS\n424.350 PS\n424.35625 * PS\n424.36250 PS\n424.36875 * PS\n424.375 PS\n424.38125 * PS\n424.38750 PS\n424.39375 * PS\n424.400 IB\n424.40625 * IB\n424.41250 IB\n424.41875 * IB\n424.425 IB\n424.43125 * IB\n424.43750 IB\n424.44375 * IB\n424.450 IB\n424.45625 * IB\n424.46250 IB\n424.46875 * IB\n424.475 IB\n424.48125 * IB\n424.48750 IB\n424.49375 * IB\n424.500 IB\n424.50625 * IB\n424.51250 IB\n424.51875 * IB\n424.525 IB\n424.53125 * IB\n424.53750 IB\n424.54375 * IB\n424.550 IB\n424.55625 * IB\n424.56250 IB\n424.56875 * IB\n424.575 IB\n424.58125 * IB\n424.58750 IB\n424.59375 * IB\n424.600 IB\n424.60625 * IB\n424.61250 IB\n424.61875 * IB\n424.625 IB\n424.63125 * IB\n424.63750 IB\n424.64375 * IB\n424.650 IB\n424.65625 * IB\n424.66250 IB\n424.66875 * IB\n424.675 IB\n424.68125 * IB\n424.68750 IB\n424.69375 * IB\n424.700 IB\n424.70625 * IB\n424.71250 IB\n424.71875 * IB\n424.725 IB\n424.73125 * IB\n424.73750 IB\n424.74375 * IB\n424.750 IB\n424.75625 * IB\n424.76250 IB\n424.76875 * IB\n424.775 IB\n424.78125 * IB\n424.78750 IB\n424.79375 * IB\n424.800 IB\n424.80625 * IB\n424.81250 IB\n424.81875 * IB\n424.825 IB\n424.83125 * IB\n424.83750 IB\n424.84375 * IB\n424.850 IB\n424.85625 * IB\n424.86250 IB\n424.86875 * IB\n424.875 IB\n424.88125 * IB\n424.88750 IB\n424.89375 * IB\n424.900 IB\n424.90625 * IB\n424.91250 IB\n424.91875 * IB\n424.925 IB\n424.93125 * IB\n424.93750 IB\n424.94375 * IB\n424.950 IB\n424.95625 * IB\n424.96250 IB\n424.96875 * IB\n424.975 IB\n424.98125 * IB\n424.98750 IB\n424.99375 * IB\nSingle channels:\n425.000 IB\n425.00625 * IB\n425.01250 IB\n425.01875 * IB\n425.025 IB\n425.03125 * IB\n425.03750 IB\n425.04375 * IB\n425.050 IB\n425.05625 * IB\n425.06250 IB\n425.06875 * IB\n425.075 IB\n425.08125 * IB\n425.08750 IB\n425.09375 * IB\n425.100 IB\n425.10625 * IB\n425.11250 IB\n425.11875 * IB\n425.125 IB\n425.13125 * IB\n425.13750 IB\n425.14375 * IB\n425.150 IB\n425.15625 * IB\n425.16250 IB\n425.16875 * IB\n425.175 IB\n425.18125 * IB\n425.18750 IB\n425.19375 * IB\n425.200 IB\n425.20625 * IB\n425.21250 IB\n425.21875 * IB\n425.225 IB\n425.23125 * IB\n425.23750 IB\n425.24375 * IB\n425.250 PS\n425.25625 * PS\n425.26250 PS\n425.26875 * PS\n425.275 PS\n425.28125 * PS\n425.28750 PS\n425.29375 * PS\n425.300 PS\n425.30625 * PS\n425.31250 PS\n425.31875 * PS\n425.325 PS\n425.33125 * PS\n425.33750 PS\n425.34375 * PS\n425.350 PS\n425.35625 * PS\n425.36250 PS\n425.36875 * PS\n425.375 PS\n425.38125 * PS\n425.38750 PS\n425.39375 * PS\n425.400 PS\n425.40625 * PS\n425.41250 PS\n425.41875 * PS\n425.425 PS\n425.43125 * PS\n425.43750 PS\n425.44375 * PS\n425.450 PS\n425.45625 * PS\n425.46250 PS\n425.46875 * PS\n425.475 PS\n425.48125 * PS\n* This frequency will be assigned with an authorized bandwidth not to exceed 6 kHz.\n(b) [Reserved]\n(c) Base or control stations shall be located within 48 km (30 miles) of the center of Buffalo or 80 km (50 miles) of the center of Detroit. In Cleveland, base or control stations will be allowed at locations north of line A that are within 48 km (30 miles) of the city center. In addition, low power (2 watts or less) base stations may locate within 80 km (50 miles) of the center of Buffalo. The following coordinates shall be used for the centers of these areas (coordinates are referenced to North American Datum 1983 (NAD83)):\nBuffalo, NY 42°52′52.2″ North latitude. 78°52′20.1″ West longitude.\nCleveland, OH 41°29′51.2″ North latitude. 81°41′49.5″ West longitude.\nDetroit, MI 42°19′48.1″ North latitude. 83°02′56.7″ West longitude.\n(d) Mobile operation shall be confined to within 80 km (50 miles) of the centers of Detroit, Cleveland, or Buffalo.","path":["Title 47—Telecommunication","CHAPTER I—FEDERAL COMMUNICATIONS COMMISSION","SUBCHAPTER D—SAFETY AND SPECIAL RADIO SERVICES","PART 90—PRIVATE LAND MOBILE RADIO SERVICES","Subpart K—Standards for Special Frequencies or Frequency Bands"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-47.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:28Z","sha256":"ff2606e5952ba65ffb023a954690e1c9850d541c2931893ce715c076d5719cc6","source_id":"us-cfr","stale":true,"prev":"us/47-cfr-90.269","next":"us/47-cfr-90.275"},"notice":"GroundRules: Original legal text. Not legal advice."}