dxtra Radio — Frequency Database

Find FM radio stations by city name, ZIP code, callsign, frequency, format/genre (e.g. 'country', 'rock', 'jazz'), or network name. Examples: 'Nashville', '90210', 'WFMT', '101.1', 'country near Austin', 'NPR near Boston'. Returns station list with frequency, callsign, city, format, and signal strength data. Source: FCC LMS (Licensing and Management System) for station data; Wikipedia for owner/brand and format enrichment. US only.

{
  "type": "object",
  "properties": {
    "query": {
      "description": "What to find: city ('Nashville'), ZIP ('90210'), callsign ('WFMT'), frequency ('101.1'), format/genre ('country'), or 'X near Y' like 'jazz near Boston'.",
      "title": "Query",
      "type": "string"
    },
    "radius_miles": {
      "default": 75,
      "description": "Search radius from the location in miles. Default 75.",
      "title": "Radius Miles",
      "type": "integer"
    },
    "lat": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Optional latitude in decimal degrees (e.g. 40.7128 for NYC). If provided with lon, restricts results to within radius_miles.",
      "title": "Lat"
    },
    "lon": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Optional longitude in decimal degrees (e.g. -74.0060 for NYC). Negative = West, positive = East.",
      "title": "Lon"
    }
  },
  "required": [
    "query"
  ],
  "title": "find_fm_stationsArguments"
}

Get detailed information for a specific FM station by callsign. Returns frequency, power, antenna height, format, owner, website, location, and a coverage-map thumbnail image. Example: 'WFMT', 'KPBS-FM', 'CIRA-FM'.

{
  "type": "object",
  "properties": {
    "callsign": {
      "description": "FM station callsign, e.g. 'WFMT', 'KPBS-FM', 'CIRA-FM'.",
      "title": "Callsign",
      "type": "string"
    }
  },
  "required": [
    "callsign"
  ],
  "title": "fm_station_detailArguments"
}

Find FM stations by format/genre category. Use this when you only have a format in mind and want to browse all stations of that format. Use find_fm_stations instead if you have a city or callsign — its query parameter also accepts format keywords. Available formats: Country, Rock, Christian, Adult Contemporary, Hip Hop, Classical, Jazz, News/Talk, Sports, Spanish, Public Radio, Classic Rock, Top 40, R&B, Alternative.

{
  "type": "object",
  "properties": {
    "format": {
      "description": "Format/genre name. One of: Country, Rock, Christian, Adult Contemporary, Hip Hop, Classical, Jazz, News/Talk, Sports, Spanish, Public Radio, Classic Rock, Top 40, R&B, Alternative. Use fm_format_list to see all available with counts.",
      "title": "Format",
      "type": "string"
    },
    "lat": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Optional latitude in decimal degrees to restrict results geographically.",
      "title": "Lat"
    },
    "lon": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Optional longitude in decimal degrees. Required together with lat to filter by location.",
      "title": "Lon"
    },
    "radius_miles": {
      "default": 100,
      "description": "Search radius from lat/lon in miles. Default 100. Ignored if lat/lon not given.",
      "title": "Radius Miles",
      "type": "integer"
    }
  },
  "required": [
    "format"
  ],
  "title": "fm_stations_by_formatArguments"
}

List all available FM format/genre categories with station counts.

{
  "type": "object",
  "properties": {},
  "title": "fm_format_listArguments"
}

Find AM radio stations by city, ZIP code, callsign, frequency, or state. Includes daytime and nighttime coverage data with Longley-Rice terrain-aware propagation modeling. Examples: 'KNX', '1010', 'New York', 'CA'. Source: FCC CDBS (Consolidated Database System). US only.

{
  "type": "object",
  "properties": {
    "query": {
      "description": "What to find: callsign ('KNX'), frequency in kHz ('1010'), city ('New York'), or two-letter state code ('CA').",
      "title": "Query",
      "type": "string"
    },
    "radius_miles": {
      "default": 100,
      "description": "Search radius in miles when query resolves to a location. Default 100.",
      "title": "Radius Miles",
      "type": "integer"
    }
  },
  "required": [
    "query"
  ],
  "title": "find_am_stationsArguments"
}

Get detailed AM station info including transmitter power, antenna pattern, groundwave coverage, and ownership. Example: 'WABC', 'KNX', 'WBBM'.

{
  "type": "object",
  "properties": {
    "callsign": {
      "description": "AM station callsign, e.g. 'WABC', 'KNX', 'WBBM'.",
      "title": "Callsign",
      "type": "string"
    }
  },
  "required": [
    "callsign"
  ],
  "title": "am_station_detailArguments"
}

Find shortwave broadcasts receivable at a location right now (or at a specific UTC hour). Uses VOACAP propagation modeling to predict which broadcasts can actually be heard, not just what's scheduled. Returns frequency, broadcaster, language, target area, and predicted signal strength. Schedule sources: HFCC (High Frequency Coordination Conference) and EiBi shortwave database. Propagation: VOACAP.

{
  "type": "object",
  "properties": {
    "lat": {
      "description": "Listener latitude in decimal degrees, e.g. 40.7128.",
      "title": "Lat",
      "type": "number"
    },
    "lon": {
      "description": "Listener longitude in decimal degrees, e.g. -74.0060. Negative = West.",
      "title": "Lon",
      "type": "number"
    },
    "hour": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Optional UTC hour 0-23 to predict for. Defaults to the current UTC hour.",
      "title": "Hour"
    }
  },
  "required": [
    "lat",
    "lon"
  ],
  "title": "shortwave_liveArguments"
}

Search the shortwave schedule database. Returns SCHEDULED broadcasts (what's listed in the operator schedules) — not what's actually receivable at a location right now. For "what can I hear from here", use shortwave_live instead, which factors in VOACAP propagation prediction. Examples: '9330', 'BBC', 'Radio Havana', 'Spanish', 'Africa'. Sources: HFCC + EiBi shortwave schedule databases.

{
  "type": "object",
  "properties": {
    "query": {
      "description": "Search term: frequency in kHz ('9330'), broadcaster ('BBC'), language ('Spanish'), or target area ('Africa').",
      "title": "Query",
      "type": "string"
    }
  },
  "required": [
    "query"
  ],
  "title": "shortwave_searchArguments"
}

Find TV stations by city, ZIP code, callsign, channel number, or network name. Returns coverage data with terrain-aware modeling. Examples: 'WABC', 'NBC near Chicago', '7', '10001'. Source: FCC TV Query (full-power DTV stations). US only.

{
  "type": "object",
  "properties": {
    "query": {
      "description": "What to find: callsign ('WABC'), channel number ('7'), network ('NBC'), city, ZIP, or 'X near Y' like 'NBC near Chicago'.",
      "title": "Query",
      "type": "string"
    },
    "radius_miles": {
      "default": 75,
      "description": "Search radius in miles when query resolves to a location. Default 75.",
      "title": "Radius Miles",
      "type": "integer"
    },
    "lat": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Optional latitude in decimal degrees. Use with lon to constrain to a specific location.",
      "title": "Lat"
    },
    "lon": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Optional longitude in decimal degrees. Negative = West.",
      "title": "Lon"
    }
  },
  "required": [
    "query"
  ],
  "title": "find_tv_stationsArguments"
}

Get detailed information for a specific TV station by callsign, including channel, network, ERP, antenna height, and a coverage-map thumbnail image (Longley-Rice terrain-aware heatmap). Example: 'WABC', 'KCBS', 'WGN-TV'.

{
  "type": "object",
  "properties": {
    "callsign": {
      "description": "TV station callsign, e.g. 'WABC', 'KCBS', 'WGN-TV'.",
      "title": "Callsign",
      "type": "string"
    }
  },
  "required": [
    "callsign"
  ],
  "title": "tv_station_detailArguments"
}

Find amateur radio repeaters near a location. Optional filters: band ('2m', '70cm', '6m', '10m', '1.25m'), mode ('FM', 'DMR', 'D-STAR', 'Fusion', 'P25', 'NXDN'). Returns frequency, offset, tone, callsign, and coverage. Sources: ARD (Amateur Repeater Directory), RadioID.net (DMR), BrandMeister network, and Yaesu WIRES-X.

{
  "type": "object",
  "properties": {
    "lat": {
      "description": "Latitude in decimal degrees, e.g. 40.7128.",
      "title": "Lat",
      "type": "number"
    },
    "lon": {
      "description": "Longitude in decimal degrees, e.g. -74.0060. Negative = West.",
      "title": "Lon",
      "type": "number"
    },
    "radius_km": {
      "default": 50,
      "description": "Search radius from lat/lon in kilometers. Default 50.",
      "title": "Radius Km",
      "type": "integer"
    },
    "band": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Optional band filter. One of: '2m', '70cm', '6m', '10m', '1.25m'.",
      "title": "Band"
    },
    "mode": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Optional mode filter. One of: 'FM', 'DMR', 'D-STAR', 'Fusion', 'P25', 'NXDN'.",
      "title": "Mode"
    }
  },
  "required": [
    "lat",
    "lon"
  ],
  "title": "find_repeatersArguments"
}

Get detailed information for a specific amateur radio repeater plus a coverage thumbnail showing handheld / mobile / yagi reception contours from terrain-aware (ITM) propagation modelling. The 'stem' is the unique repeater key like 'KO4QJC~433_9000' (callsign plus frequency in kHz with underscore). Get stems from find_repeaters results — each repeater has a 'key' or 'stem' field. Example: 'W8MRC~146_7400'.

{
  "type": "object",
  "properties": {
    "stem": {
      "description": "Repeater stem from find_repeaters output. Format: callsign + tilde + frequency-in-kHz with underscore. E.g. 'W8MRC~146_7400' for W8MRC on 146.74 MHz.",
      "title": "Stem",
      "type": "string"
    }
  },
  "required": [
    "stem"
  ],
  "title": "repeater_detailArguments"
}

Find NOAA Weather Radio (NWR) stations near a location. Returns frequency, callsign, transmitter location, and coverage area. NWR broadcasts on 162.400-162.550 MHz. Source: NOAA National Weather Service (weather.gov NWR transmitter list).

{
  "type": "object",
  "properties": {
    "lat": {
      "description": "Listener latitude in decimal degrees, e.g. 40.7128.",
      "title": "Lat",
      "type": "number"
    },
    "lon": {
      "description": "Listener longitude in decimal degrees. Negative = West.",
      "title": "Lon",
      "type": "number"
    },
    "radius_miles": {
      "default": 75,
      "description": "Search radius in miles. Default 75.",
      "title": "Radius Miles",
      "type": "integer"
    }
  },
  "required": [
    "lat",
    "lon"
  ],
  "title": "find_weather_radioArguments"
}

Get detailed information for a specific NOAA Weather Radio station plus a coverage thumbnail showing handheld / portable / fixed reception contours from terrain-aware (ITM) propagation modelling. The 'stem' is the unique key like 'WXK86~162_550' (callsign plus frequency in kHz with underscore). Get stems from find_weather_radio results — each station has a 'key' or 'stem' field. Example: 'KIH26~162_550', 'WXK86~162_550'.

{
  "type": "object",
  "properties": {
    "stem": {
      "description": "NOAA station stem from find_weather_radio output. Format: callsign + tilde + frequency-in-kHz with underscore. E.g. 'WXK86~162_550' for 162.55 MHz.",
      "title": "Stem",
      "type": "string"
    }
  },
  "required": [
    "stem"
  ],
  "title": "weather_radio_detailArguments"
}

Find public safety radio systems (police, fire, EMS, sheriff, transit, hospital) near a US location. Returns agency name, system type (conventional / trunked / encrypted), frequency or talkgroup, and coverage data with terrain-aware modeling. Source: FCC Universal Licensing System (ULS) Part 90 — Land Mobile Private archive (l_LMpriv). US only.

{
  "type": "object",
  "properties": {
    "lat": {
      "description": "Latitude in decimal degrees, e.g. 40.7128.",
      "title": "Lat",
      "type": "number"
    },
    "lon": {
      "description": "Longitude in decimal degrees. Negative = West.",
      "title": "Lon",
      "type": "number"
    },
    "radius_miles": {
      "default": 50,
      "description": "Search radius in miles. Default 50.",
      "title": "Radius Miles",
      "type": "integer"
    }
  },
  "required": [
    "lat",
    "lon"
  ],
  "title": "find_public_safetyArguments"
}

Get current FEMA IPAWS emergency alerts (Integrated Public Alert and Warning System). Returns active alerts including type, severity, area, and instructions. Updated in real-time.

{
  "type": "object",
  "properties": {},
  "title": "emergency_alertsArguments"
}

Get current tropospheric ducting conditions for FM radio DX. Returns whether enhanced propagation (tropo) is active, the tropo score, anomaly count, and details of any stations being received beyond normal range. Tropo ducting allows FM signals to travel hundreds of miles beyond their normal coverage.

{
  "type": "object",
  "properties": {},
  "title": "tropo_statusArguments"
}

Find radio stations in countries outside the USA. Supported country codes: UK / GB (United Kingdom), EU (Europe — specify country with query like 'Germany', 'France' or 'SE'), AU (Australia), BR (Brazil), ZA (South Africa), CL (Chile), AR (Argentina), TH (Thailand), MY (Malaysia), SG (Singapore), BN (Brunei), VN (Vietnam), TW (Taiwan), RU (Russia), NZ (New Zealand), JP (Japan), CA (Canada), ES (Spain), FR (France), DE (Germany). Sources by country (official spectrum regulators where available): France: ANFR via data.gouv.fr (official open data) UK: Ofcom TxParams CSVs Germany/EU: BNetzA (Bundesnetzagentur) Australia: ACMA RRL spectra Brazil: ANATEL open data Chile: SUBTEL via datos.gob.cl Japan: MIC (Ministry of Internal Affairs and Communications) Canada: ISED baserad South Africa: ICASA Terrestrial Broadcasting Frequency Plan New Zealand: RSM PRISM database Community-maintained sources (where official data is not openly accessible): Spain, Russia: radiomap.eu Argentina: worldradiomap.com Vietnam, Taiwan, Thailand, Brunei/Malaysia/Singapore: asiawaves.net Coverage depth varies by country — official-source countries (France, UK, AU, BR, DE, JP, CA) are most complete. Optional query filters results by station name, city, or frequency.

{
  "type": "object",
  "properties": {
    "country_code": {
      "description": "ISO-3166 alpha-2 country code: 'UK' or 'GB' (United Kingdom), 'AU' (Australia), 'BR' (Brazil), 'ZA' (South Africa), 'CL' (Chile), 'AR' (Argentina), 'TH' (Thailand), 'MY' (Malaysia), 'SG' (Singapore), 'BN' (Brunei), 'VN' (Vietnam), 'TW' (Taiwan), 'RU' (Russia), 'NZ' (New Zealand). For European countries other than UK, use 'EU' and pass the country in the query parameter.",
      "title": "Country Code",
      "type": "string"
    },
    "query": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Optional. Filter results by station name, city, or frequency. For 'EU' country_code, REQUIRED — pass the country name or code (e.g. 'Germany' or 'SE').",
      "title": "Query"
    }
  },
  "required": [
    "country_code"
  ],
  "title": "find_international_stationsArguments"
}

Look up an amateur radio operator by callsign. Returns name, address, license class, grant date, and grid square. Covers 832,000+ US amateur radio operators. Source: FCC Universal Licensing System (ULS) amateur archive (l_amat.zip). US callsigns only. Example: 'W1AW', 'N2XYZ'.

{
  "type": "object",
  "properties": {
    "callsign": {
      "description": "Amateur radio callsign, e.g. 'W1AW', 'N2XYZ', 'AA1A'. US callsigns only.",
      "title": "Callsign",
      "type": "string"
    }
  },
  "required": [
    "callsign"
  ],
  "title": "ham_callsign_lookupArguments"
}

Get statistics about the dxtra.com radio frequency databases. Returns total station counts for FM, AM, shortwave, TV, repeaters, and international databases.

{
  "type": "object",
  "properties": {},
  "title": "database_statsArguments"
}