County Frequency Map

Every county in the Iowa Section has one or more simplex frequencies assigned for emergency planning. This plan helps prevent interference between adjacent counties. Please note that any operation is permitted to use any available frequency, as needs dictate — the planning represents a starting point.

Please direct questions to N0GUD, EC for District 6.

District 1 Mutual Aid 146.400
District 2 Mutual Aid 147.405
District 3 Mutual Aid 147.585
District 4 Mutual Aid 146.595
District 5 Mutual Aid 147.405
District 6 Mutual Aid 147.585
ADAIR 146.460
ADAMS 147.540
ALLAMAKEE 147.435
APPANOOSE 146.430
AUDUBON 147.555
BENTON 146.400
BLACKHAWK 147.450
BOONE 146.550
BREMER 147.555
BUCHANAN 146.580
BUENAVISTA 147.435
BUTLER 146.475
CALHOUN 147.570
CARROLL 147.540
CASS 147.480
CEDAR 147.450
CERROGORDO 147.570
CHEROKEE 146.490
CHICKASAW 147.570
CLARKE 147.540
CLAY 146.475
CLAYTON 146.550
CLINTON 146.460
CRAWFORD 146.475
DALLAS 147.480
DAVIS 146.535
DECATUR 146.490
DELAWARE 147.465
DESMOINES 147.435
DICKINSON 146.460
DUBUQUE 146.475
EMMET 147.555
FAYETTE 147.510
FLOYD 146.490
FRANKLIN 146.565
FREMONT 147.465
GREENE 147.525
GRUNDY 147.480
GUTHRIE 146.445
HAMILTON 147.510
HANCOCK 146.580
HARDIN 147.450
HARRISON 147.435
HENRY 146.550
HOWARD 146.565
HUMBOLDT 147.525
IDA 146.445
IOWA 147.525
JACKSON 146.430
JASPER 147.555
JEFFERSON 146.535
JOHNSON 147.495
JONES 147.555
KEOKUK 147.540
KOSSUTH 146.415
LEE 147.540
LINN 146.505
LINN2 147.480
LOUISA 147.450
LUCAS 146.445
LYON 147.480
MADISON 147.495
MAHASKA 146.415
MARION 147.510
MARSHALL 146.505
MILLS 147.435
MITCHELL 147.510
MONONA 146.565
MONROE 147.450
MONTGOMERY 147.525
MUSCATINE 147.510
OBRIEN 147.570
OSCEOLA 147.510
PAGE 146.460
PALOALTO 146.535
PLYMOUTH 146.415
POCAHONTAS 146.490
POLK 146.490
POLK2 146.430
POLK3 147.420
POLK4 146.460
POTTAWATTAMIE 146.430
POWESHIEK 146.460
RINGGOLD 146.460
SAC 147.555
SCOTT 146.475
SHELBY 146.565
SIOUX 147.555
STORY 146.430
TAMA 146.580
TAYLOR 147.480
UNION 147.435
VANBUREN 146.490
WAPELLO 147.555
WARREN 146.565
WASHINGTON 146.415
WAYNE 146.505
WEBSTER 147.435
WINNEBAGO 147.510
WINNESHIEK 146.460
WOODBURY 146.535
WORTH 146.415
WRIGHT 146.475